Nadużywanie leków na receptę
Patofizjologia i mechanizm
Nadużywanie leków na receptę, w tym opioidów, benzodiazepin i stymulantów, stanowi poważne zagrożenie zdrowia publicznego, prowadząc do uzależnienia, przedawkowań i śmierci. Mechanizmy działania tych leków obejmują modulację receptorów opioidowych (mu, kappa, delta, OFQ/N) oraz receptorów GABA, co wpływa na neuroprzekaźnictwo i funkcje mózgu, w tym ośrodek nagrody i pień mózgu. Nadużywanie prowadzi do zmian neuroadaptacyjnych, takich jak internalizacja receptorów opioidowych i zmniejszona transmisja GABA-ergiczna, co skutkuje tolerancją, zespołem odstawienia i przewlekłą podatnością na nawrót. Ryzyko uzależnienia jest szczególnie wysokie przy wysokich dawkach, częstym stosowaniu i szybkiej farmakokinetyce leków. Wśród pacjentów przepisanych leki przeciwbólowe wykazują 8-krotnie wyższe ryzyko pozamedycznego stosowania, środki uspokajające 10-krotnie, a stymulanty 7-krotnie. Nadużywanie często współwystępuje z zaburzeniami psychicznymi, co komplikuje leczenie i wymaga zintegrowanego podejścia terapeutycznego.
- Wprowadzenie do nadużywania leków na receptę
- Patofizjologia nadużywania leków na receptę
- Wpływ leków na receptę na układ nerwowy
- Mechanizm powstawania uzależnienia
- Specyficzne mechanizmy działania różnych grup leków
- Mechanizmy tolerancji i zespołu odstawienia
- Rola glutaminianu w rozwoju uzależnienia
- Czynniki ryzyka nadużywania leków na receptę
- Czynniki farmakologiczne i fizjologiczne
- Współistnienie zaburzeń psychicznych
- Dostęp do przepisywanych leków
- Dywersja leków na receptę jako mechanizm nadużywania
- Konsekwencje zdrowotne nadużywania leków na receptę
- Konsekwencje ogólnoustrojowe
- Objawy odstawienia i uzależnienie
- Objawy odstawienia leków
- Manifestacje w jamie ustnej
- Badania nad nowymi podejściami do leczenia nadużywania leków na receptę
Wprowadzenie do nadużywania leków na receptę
Nadużywanie leków na receptę definiuje się jako używanie leku przepisanego przez lekarza w sposób niezgodny z zaleceniami lub w celach innych niż zamierzone przez przepisującego. Problem ten stał się istotnym zagrożeniem dla zdrowia publicznego na całym świecie, przynosząc poważne konsekwencje medyczne i społeczne.12 Najczęściej nadużywanymi grupami leków na receptę są opioidy, leki depresyjne działające na ośrodkowy układ nerwowy (CNS) oraz środki stymulujące.3
Nadużywanie leków na receptę może mieć charakter ciągły i kompulsywny, pomimo negatywnych konsekwencji. Istotne jest wczesne rozpoznanie tego problemu i wdrożenie interwencji, zanim zmieni się on w uzależnienie.4 Problem ten dotyka różnych grup wiekowych, jednak najwyższy poziom nadużywania leków na receptę obserwuje się wśród nastolatków i młodych dorosłych. Jednocześnie narasta problem nadużywania leków na receptę wśród osób starszych, szczególnie gdy łączą one leki z alkoholem.5
Patofizjologia nadużywania leków na receptę
Wpływ leków na receptę na układ nerwowy
Leki na receptę ingerują w sposób, w jaki neurony wysyłają, odbierają i przetwarzają sygnały za pośrednictwem neuroprzekaźników. Niektóre leki, jak opioidy, mogą aktywować neurony, ponieważ ich struktura chemiczna naśladuje naturalne neuroprzekaźniki w organizmie. Pozwala to lekom przyłączać się i aktywować neurony. Mimo że te leki naśladują własne chemiczne substancje mózgu, nie aktywują neuronów w taki sam sposób jak naturalny neuroprzekaźnik, co prowadzi do przesyłania nieprawidłowych informacji przez sieć neuronową.6
Inne leki, takie jak amfetamina czy kokaina, mogą powodować uwalnianie przez neurony nienormalnie dużych ilości naturalnych neuroprzekaźników lub zapobiegać normalnemu recyklingowi tych substancji chemicznych mózgu poprzez ingerencję w transportery. To również wzmacnia lub zakłóca normalną komunikację między neuronami.7 Niektóre leki, jak opioidy, zakłócają również funkcjonowanie innych części mózgu, takich jak pień mózgu, który kontroluje podstawowe funkcje niezbędne do życia, w tym częstość akcji serca, oddychanie i sen. Ta ingerencja wyjaśnia, dlaczego przedawkowanie może powodować depresję oddechową i śmierć.8
Mechanizm powstawania uzależnienia
Uzależnienie jest obecnie rozumiane jako choroba mózgu.9 Gdy osoba rozwija uzależnienie od substancji, dzieje się tak, ponieważ mózg zaczyna się zmieniać. Substancje uzależniające wywołują nieproporcjonalnie silną reakcję po dotarciu do mózgu. Zamiast prostego, przyjemnego wzrostu poziomu dopaminy, wiele nadużywanych leków, takich jak opioidy, kokaina czy nikotyna, powoduje zalanie szlaku nagrody dopaminą, 10 razy silniejsze niż w przypadku naturalnej nagrody.10
Mózg zapamiętuje ten wzrost i kojarzy go z substancją uzależniającą. Jednak przy chronicznym stosowaniu substancji, z czasem obwody mózgowe dostosowują się i stają się mniej wrażliwe na dopaminę. Osiągnięcie przyjemnego doznania staje się coraz ważniejsze, ale jednocześnie buduje się tolerancja i potrzeba coraz większej ilości tej substancji, aby wygenerować pożądany poziom „haju”.11
Ponieważ powszechnie nadużywane leki na receptę aktywują ośrodek nagrody w mózgu, możliwe jest rozwinięcie zarówno fizycznego uzależnienia, jak i uzależnienia psychicznego.12 Uzależnienie fizyczne, nazywane także tolerancją na lek, jest odpowiedzią organizmu na długotrwałe stosowanie leku. Osoby uzależnione od leku mogą wykazywać zarówno uzależnienie fizyczne, jak i kompulsywne poszukiwanie leku oraz kontynuować jego używanie, nawet gdy powoduje to poważne problemy w ich życiu.13
Specyficzne mechanizmy działania różnych grup leków
Opioidy działają poprzez wiązanie się z receptorami opioidowymi znajdującymi się w neuronach rozproszonych w układzie nerwowym i odpornościowym. Zidentyfikowano cztery główne typy receptorów opioidowych: mu, kappa, delta i niedawno zidentyfikowany OFQ/N.14 Zrozumienie roli endogennych peptydów pozwala zrozumieć, dlaczego leki wiążące się z receptorami opioidowymi mają tak głęboki wpływ na wiele układów narządów i funkcji organizmu.15
Większość nadużywanych opioidów to prototypowe agonisty receptora mu. Euforia związana z aktywacją receptora mu jest często określana jako „haj”. Co więcej, gdy opioidy są wstrzykiwane lub wdychane, ich poziom w mózgu szybko wzrasta, powodując „rush” lub dreszczyk. Rush to krótkie, intensywne, zwykle przyjemne doznanie, po którym następuje dłużej trwający haj. Gdy opioidy są stosowane przewlekle, rozwija się tolerancja i uzależnienie fizyczne. Z czasem osoby z uzależnieniem fizjologicznym często próbują uniknąć nieprzyjemnych objawów odstawienia, zamiast dążyć do przyjemnych doznań związanych z początkowym użyciem opioidów.16
Benzodiazepiny wiążą się z receptorami kwasu gamma-aminomasłowego (GABA) w mózgu. GABA jest neuroprzekaźnikiem hamującym, innymi słowy, hamuje aktywność mózgu. Zmniejszenie aktywności mózgu odczuwane jest jako senność i spokój.17 Stosowaniu benzodiazepin towarzyszą liczne skutki uboczne, w tym tolerancja (zmniejszona wrażliwość) na lek, zaburzenia poznawcze, niepamięć następcza (niemożność zapamiętania zdarzeń, które nastąpiły po zażyciu leku), zwiększone ryzyko choroby Alzheimera, zwiększone ryzyko upadków (szczególnie wśród osób starszych), a przede wszystkim uzależnienie, nadużywanie i przedawkowanie.18
Nawet przyjmowanie benzodiazepin zgodnie z zaleceniami lekarza przepisującego może prowadzić do uzależnienia. Objawy odstawienia są prawdopodobne u pacjentów, którzy przyjmowali benzodiazepiny nieprzerwanie przez okres dłuższy niż kilka tygodni.19 Nadużywanie benzodiazepin może samo w sobie prowadzić do przedawkowania i śmierci, ale zgony z powodu przedawkowania zazwyczaj występują w połączeniu z innymi substancjami – ogólnie z innymi depresantami ośrodkowego układu nerwowego, które podobnie jak benzodiazepiny, mogą prowadzić do zagrażającego życiu efektu spowolnienia lub zatrzymania oddychania.20
Stymulanty zwiększają aktywność mózgu, co skutkuje większą czujnością, uwagą i energią.21 Nadużywanie stymulantów – na przykład przez przyjmowanie ich w wyższych dawkach lub przez kruszenie tabletek i wciąganie ich – może prowadzić do uzależnienia. Wysokie dawki mogą podnosić temperaturę ciała. Niewłaściwe stosowanie stymulantów lub używanie ich wraz z lekami zmniejszającymi przekrwienie może powodować nieregularne bicie serca.22
Mechanizmy tolerancji i zespołu odstawienia
Mechanizmy tolerancji i odstawienia obejmują między innymi: W odpowiedzi na długotrwałą ekspozycję na stosunkowo wysokie dawki egzogennych opioidów, komórki internalizują swoje receptory opioidowe mu i delta. Dlatego zwiększone poziomy opioidów i/lub zwiększona potencja opioidów są niezbędne do wygenerowania tego samego efektu na mniejszej liczbie receptorów (tolerancja). Podobnie, po usunięciu egzogennych opioidów z organizmu, pozostałe endogenne opioidy nie są w stanie wystarczająco aktywować małej liczby pozostałych receptorów (odstawienie).23
Istnieją dowody, że długotrwałe podawanie opioidów może trwale zmieniać gęstość dendrytycznych kolców w niektórych neuronach, a te trwałe zmiany mogą przyczyniać się do długotrwałej podatności na nawrót.24
W przypadku benzodiazepin i innych leków działających na receptor GABA, mechanizm odstawienia wynika z modulacyjnych zmian w receptorze GABAA, co prowadzi do zmniejszenia transmisji GABA-ergicznej i zmniejszonej kontroli hamującej nad pobudzającą neurotransmisją.25
Odstawienie opioidów jest mediowane zarówno na poziomie receptora, jak i poprzez adaptacje komórkowe oraz adaptacje sieci nerwowych. Na poziomie receptora, tolerancja na opioidy indukuje internalizację receptora ze zmniejszoną ekspresją receptora na powierzchni komórki i desensytyzację receptora, przez co stymulacja receptora jest mniej efektywnie sprzężona z aktywacją drugiego przekaźnika.26
Rola glutaminianu w rozwoju uzależnienia
Uzależnienie od leków, w tym leków na receptę, jest związane z deficytami w klirensie glutaminianu i aktywacją postsynaptycznych receptorów glutaminergicznych.27 Homeostaza glutaminianu jest utrzymywana przez transporter glutaminianu typu 1 (GLT-1), który odgrywa kluczową rolę w usuwaniu uwolnionego glutaminianu z synaps i zachowaniach poszukiwania narkotyków.28
Jądro półleżące (NAc) jest zaangażowane w wzmacniające i nagradzające efekty kilku nadużywanych leków. Zaburzenia homeostazy glutaminianu w NAc okazały się być związane z zachowaniami poszukiwania narkotyków i przewlekłym używaniem narkotyków. Uwalnianie glutaminianu z projekcji kory przedczołowej (PFC) do NAc mediuje zachowania poszukiwania narkotyków, co wykazano w poprzednich badaniach.29
Warto zauważyć, że homeostaza glutaminianu jest kontrolowana przez szereg receptorów i transporterów glutaminianu. Jednym z tych transporterów jest GLT-1, który może usuwać większość synaptycznego glutaminianu. Co ciekawe, ekspresja GLT-1 okazała się być obniżona natychmiast w modelu samopodawania kokainy.30 Efekty poszukiwania narkotyków stwierdzone w przypadku kilku nadużywanych narkotyków są konsekwentnie zgłaszane jako mediowane przez mechanizm glutaminergiczny.31
Czynniki ryzyka nadużywania leków na receptę
Czynniki farmakologiczne i fizjologiczne
Kluczowe czynniki farmakologiczne związane z uzależnieniem od leków obejmują: wysoką częstotliwość stosowania leków, wysokie dawki, szybki czas początku działania i wysoką potencję leku.32 Powyższe praktyki nadmiernego przepisywania leków mogą prowadzić do zaostrzenia uzależnienia od leków na receptę.33
Ryzyko uzależnienia i szybkość uzależnienia różni się w zależności od leku. Niektóre leki, takie jak opioidy przeciwbólowe, mają wyższe ryzyko i powodują uzależnienie szybciej niż inne.34
Pacjenci, którym przepisano lek, wykazywali 8-krotnie wyższe ryzyko późniejszego pozamedycznego stosowania leków przeciwbólowych na receptę. Ryzyko było 10-krotnie wyższe dla środków uspokajających i 7-krotnie wyższe dla stymulantów.35
Współistnienie zaburzeń psychicznych
Nadużywanie opioidów analgetycznych jest często związane z zaburzeniami zdrowia psychicznego, w tym depresją, zaburzeniem stresowym pourazowym i zaburzeniami lękowymi.36 Osoby z chorobami psychicznymi są nadreprezentowane zarówno wśród osób, którym przepisuje się opioidy, jak i tych, którzy je przedawkowują. Dalsze definiowanie populacji o większym ryzyku ma kluczowe znaczenie dla opracowania i wdrożenia skutecznych interwencji.37
Stany zdrowia psychicznego często współistnieją z nadużywaniem leków na receptę, tworząc złożoną interakcję, która może komplikować leczenie i powrót do zdrowia. Stany takie jak lęk, depresja i zespół stresu pourazowego (PTSD) mogą prowadzić ludzi do samoleczenia lekami na receptę.38 Skuteczne leczenie nadużywania leków na receptę musi uwzględniać zarówno używanie substancji, jak i leżące u jego podstaw zaburzenia zdrowia psychicznego. Zintegrowane plany leczenia, które łączą zarządzanie lekami z terapią, mogą zapewnić kompleksowe podejście do powrotu do zdrowia.39
Dostęp do przepisywanych leków
Niektórzy eksperci uważają, że więcej osób nadużywa leków na receptę, ponieważ dostępnych jest więcej leków. Lekarze zgłaszają wypisywanie większej liczby recept niż kiedykolwiek wcześniej.40 Pracownicy służby zdrowia mogą przepisywać więcej leków niż to konieczne, często z powodu presji, aby szybko zarządzać bólem lub innymi dolegliwościami. Ta praktyka może prowadzić do nadmiaru niewykorzystanych leków, zwiększając ryzyko niewłaściwego użycia.41
Osoby, które nadużywają opioidów, nauczyły się wykorzystywać tę nową wrażliwość lekarzy na ból pacjenta, a klinicyści zmagają się z leczeniem pacjentów bez nadmiernego przepisywania tych leków.42
Dywersja leków na receptę jako mechanizm nadużywania
Definicja i kanały dywersji
Dywersja leków na receptę oznacza nielegalne kierowanie regulowanych farmaceutyków z legalnych źródeł na nielegalny rynek i może wystąpić we wszystkich punktach procesu dostarczania leków, od oryginalnego miejsca produkcji do hurtowni, gabinetu lekarskiego, apteki detalicznej lub pacjenta.43
Dywersja może nastąpić na wiele sposobów, w tym: nielegalna sprzedaż recept przez lekarzy i tych, którzy na ulicy określani są jako „luźni farmaceuci”; „doctor shopping” przez osoby, które odwiedzają wielu lekarzy, aby uzyskać wiele recept; kradzież, fałszowanie lub zmiana recept przez pracowników służby zdrowia i pacjentów; napady i kradzieże od producentów, dystrybutorów i aptek; oraz kradzieże instytucjonalnych zapasów leków.44
Ponadto istnieją coraz większe dowody na to, że dywersja znacznych ilości opioidów na receptę i benzodiazepin odbywa się poprzez włamania do domów, a także przemyt transgraniczny zarówno na poziomie detalicznym, jak i hurtowym.45
Dodatkowe ścieżki dywersji
Ostatnie badania udokumentowały dywersję przez takie kanały jak: shorting (niedoliczanie) i kradzież przez farmaceutów i pracowników aptek; recykling leków przez farmaceutów i pracowników aptek; kradzieże leków z apteczki przez personel sprzątający i remontowy w domach; kradzież leków gości przez personel naprawczy i sprzątający w hotelu; oraz oszustwa Medicare, Medicaid i inne oszustwa ubezpieczeniowe przez pacjentów, farmaceutów i handlarzy ulicznych.46
Podczas gdy „doctor shoppers”, lekarze i Internet przyciągają większość uwagi w odniesieniu do dywersji, dane przedstawione w tym artykule sugerują, że istnieje wiele aktywnych rynków ulicznych, w które zaangażowani są pacjenci, beneficjenci Medicaid i apteki.47 Zakres dywersji jest tak szeroki, że odpowiedzi na pytanie, jakie są główne źródła dywersji, naprawdę zależą od tego, kogo się pyta.48
Główne źródła leków nadużywanych na ulicy
Agencje federalne utrzymują, że przekierowane leki trafiają na nielegalny rynek głównie poprzez „doctor shoppers”, niewłaściwe praktyki przepisywania przez lekarzy i niewłaściwe wydawanie przez farmaceutów.49 W kontraście, w 2005 roku autorzy przeprowadzili badanie wśród śledczych zajmujących się dywersją w 300 agencjach policyjnych i regulacyjnych uczestniczących w ogólnokrajowym programie nadzoru. Głównym celem grup było wyjaśnienie źródeł nadużywanych leków na receptę trafiających na ulice.50
Wśród tych osób, podstawowymi źródłami nabywania leków na receptę byli: dealerzy uliczni; lekarze wypisujący recepty; nielegalna sprzedaż w małych aptekach; znajomi, którzy sprzedają swoje osobiste recepty; „doctor shopping”; przyjaciele i członkowie rodziny; klienci pracownic seksualnych; pacjenci z niepełnosprawnościami; odbiorcy Medicaid; oraz osobiste recepty przeznaczone do leczenia uzależnienia od narkotyków lub chorób psychicznych.51
Powtarzającym się tematem było zaangażowanie niektórych aptek w oszustwa Medicaid. Większość pacjentów zgłaszała problemy z przestrzeganiem zaleceń dotyczących leków sporadycznie lub chronicznie, z powodu skutków ubocznych lub złożoności schematu leczenia, a do większości z nich wielokrotnie zwracano się z prośbą o sprzedaż ich leków.52
Konsekwencje zdrowotne nadużywania leków na receptę
Konsekwencje ogólnoustrojowe
Nadużywanie leków na receptę może powodować szereg problemów. Leki na receptę mogą być szczególnie niebezpieczne, a nawet prowadzić do śmierci, gdy są przyjmowane w wysokich dawkach, gdy są łączone z innymi lekami na receptę lub niektórymi lekami dostępnymi bez recepty, lub gdy są przyjmowane z alkoholem lub nielegalnymi lub rekreacyjnymi narkotykami.53
Opioidy mogą powodować łagodne uczucie radości. Niektóre osoby używające ich nielegalnie wciągają je przez nos lub wstrzykują, aby uzyskać ten efekt szybciej. Wstrzykiwanie narkotyków zwiększa ryzyko zarażenia się chorobami takimi jak HIV i wirusowe zapalenie wątroby typu C.54
Przyjmowanie leków depresyjnych CNS przez kilka dni lub tygodni może pomóc poczuć się spokojnie i sennie. Ale po pewnym czasie może być potrzebna większa dawka, aby uzyskać to samo uczucie. Używanie ich z alkoholem może powodować wolną pracę serca, spowolnione oddychanie i śmierć.55
Nadużywanie stymulantów może prowadzić do problemów z sercem, napadów padaczkowych, ataków paniki, paranoi i agresywnego zachowania.56
Objawy odstawienia i uzależnienie
Nadużywanie leków, nawet leków na receptę, może zmienić sposób działania mózgu. Większość ludzi zaczyna od dobrowolnego przyjmowania tych leków. Ale z czasem zmiany w mózgu wpływają na twoją samokontrolę i zdolność podejmowania dobrych decyzji. Jednocześnie pojawiają się intensywne pragnienia zażywania większej ilości leków.57
Nadużywanie leków na receptę może stać się ciągłe i kompulsywne, pomimo negatywnych konsekwencji.58 Prawdopodobnie najbardziej powszechnym ryzykiem nadużywania leków na receptę jest uzależnienie. Ludzie, którzy nadużywają leków, mogą się uzależnić tak łatwo, jakby brali narkotyki uliczne.59
Opioidy mogą powodować wymioty, problemy z oddychaniem, śpiączkę lub śmierć.60 Nadużywanie leków na receptę może prowadzić do uzależnienia, przedawkowania, a nawet śmierci.61
Objawy odstawienia leków
W przypadku wielu leków na receptę, przerwanie ich przyjmowania po długotrwałym używaniu może wywołać zespół odstawienia. Na przykład:
- W przypadku opioidów: zespół odstawienia może obejmować bóle ciała, diarę, dreszcze, bezsenność, wymioty i poważne skurcze mięśni.62
- W przypadku benzodiazepin: objawy odstawienia mogą obejmować napady lękowe, bezsenność, drżenie i drgawki, które mogą być zagrażające życiu.63
- W przypadku stymulantów: odstawienie może powodować depresję, zmęczenie, zwiększony apetyt i zaburzenia snu.64
Manifestacje w jamie ustnej
Leki przepisywane są z coraz większą częstotliwością i w coraz większych ilościach. Poważne zdarzenie niepożądane związane z lekiem stanowi od 2,4% do 16,2% wszystkich przyjęć do szpitala. Wiele zdarzeń niepożądanych związanych z lekami występuje w jamie ustnej lub wokół niej w izolacji lub jako objaw kliniczny efektu ogólnoustrojowego.65
Główne kategorie objawów w jamie ustnej lub okołoustnych, które można przypisać przepisanym lekom, to przerost dziąseł, hiperpigmentacja jamy ustnej, reakcja nadwrażliwości jamy ustnej, martwica kości związana z lekami, kserostomia (suchość jamy ustnej) i inne stany jamy ustnej lub okołoustne, takie jak obrzęk naczynioruchowy i oparzenia chemiczne.66
Przerost dziąseł (lub hiperplazja/hipertrofia dziąseł lub przerost) to powiększenie tkanki dziąsłowej w jamie ustnej. Klasyczne leki związane z przerostem dziąseł wywołanym przez leki obejmują blokery kanału wapniowego, leki przeciwdrgawkowe i cyklosporynę (Sandimmune). Erytromycyna i doustne środki antykoncepcyjne również zostały powiązane z przerostem dziąseł.67
Kserostomia to subiektywne odczucie suchości w jamie ustnej. Gruczoły ślinowe przyuszne, podżuchwowe i podjęzykowe odpowiadają za większość produkcji śliny. Kserostomia wywołana przez leki występuje najczęściej u osób starszych (powyżej 65 roku życia), a zwłaszcza u tych pacjentów, którym przepisano więcej niż jeden lek.68
Badania nad nowymi podejściami do leczenia nadużywania leków na receptę
Istniejące terapie i ich ograniczenia
Leczenie uzależnienia od opioidów obejmuje leki, które mogą pomóc ludziom uzyskać kontrolę bez wysokiego ryzyka uzależnienia.69 Eksperci uważają, że leczenie wspomagane farmakologicznie metadonem, naltreksonem lub suboxonem i terapia poznawczo-behawioralna jest najlepszym leczeniem dla większości pacjentów z uzależnieniem od opioidów.70
Chociaż istniejące leki (np. buprenorfina, metadon, nalokson, naltrekson, lofeksydyna) mają udowodnioną użyteczność w leczeniu zaburzeń związanych z używaniem opioidów (OUD), nie są one pozbawione ograniczeń. Istotnie, problematyczne pozostałe objawy i wskaźniki przerwania leczenia nękają te terapie, pozostawiając zwodniczo ogromną niezaspokojoną potrzebę medyczną, którą można by zaspokoić, przynajmniej częściowo, przez nowe leki.71
Modulatory allosteryczne jako obiecujące podejście
Ważnym elementem nowych podejść terapeutycznych są modulatory allosteryczne. W oparciu o ich tłumienie/wzmacnianie odpowiedzi endogennych, negatywne modulatory allosteryczne (NAM) i pozytywne modulatory allosteryczne (PAM) mogą zapewnić bardziej fizjologicznie istotne efekty w porównaniu z agonistami i antagonistami działającymi na ten sam receptor, co ostatecznie może skutkować poprawą wyników klinicznych.72
Ważne jest, aby zauważyć, że ze względu na złożoność cyklu uzależnienia, różne etapy choroby (np. przejście od sporadycznego do przewlekłego używania, ostre odstawienie, opóźniony nawrót) prawdopodobnie mają różne (choć nakładające się) patofizjologie.73 Dlatego jest mało prawdopodobne, aby wśród tych mechanizmów znalazła się „srebrna kula” do leczenia OUD, a leki o tych mechanizmach działania prawdopodobnie będą użyteczne na różnych etapach cyklu uzależnienia.74
Naltrekson jako przykład antagonisty receptorów opioidowych
Naltrekson jest czystym antagonistą receptorów opioidowych i działa głównie poprzez wiązanie się z receptorami opioidowymi mu. Poprzez wiązanie się z tymi receptorami, blokuje euforyczne (przyjemne lub „high”) efekty związane z użyciem alkoholu lub opioidów. Sam naltrekson ma niewielki lub żaden efekt pod nieobecność alkoholu lub opioidów.75
Naltrekson działa w zaburzeniach związanych z używaniem opioidów poprzez wytwarzanie całkowitej, ale odwracalnej blokady efektów opioidu, takich jak uzależnienie fizyczne, depresja oddechowa, mioza (zwężenie źrenic), analgezja (ulga w bólu), euforia (przyjemne efekty), głód narkotyku i tolerancja.76
Uważa się, że naltrekson działa w zaburzeniach związanych z używaniem alkoholu poprzez blokowanie efektów endogennych opioidów wytwarzanych naturalnie przez organizm (jak endorfiny), co sprawia, że spożywanie alkoholu jest mniej przyjemne. To działanie pomaga zmniejszyć spożycie alkoholu.77
Integracja różnych podejść terapeutycznych
Ostatecznie przewiduje się, że wiele leków, zintegrowanych zarówno z interwencjami psychospołecznymi, jak potencjalnie z urządzeniami, zastosowanych w skoordynowany sposób, będzie potrzebnych do osiągnięcia naprawdę skutecznych terapii dostosowanych dla maksymalnej skuteczności u różnych osób.78
Programy redukcji szkód związanych z przedawkowaniem podkreślają szerszą dystrybucję (dla użytkowników niemedycznych) antidotum opioidowego, naloksonu, który może być używany w nagłych wypadkach przez każdego, kto jest świadkiem przedawkowania.79
Skuteczne leczenie nadużywania leków na receptę musi uwzględniać zarówno używanie substancji, jak i leżące u jego podstaw zaburzenia zdrowia psychicznego. Zintegrowane plany leczenia, które łączą zarządzanie lekami z terapią, mogą zapewnić kompleksowe podejście do powrotu do zdrowia.80
Kolejne rozdziały
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Materiały źródłowe
- #1 Prescription drug abuse – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/symptoms-causes/syc-20376813
Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Early identification of prescription drug abuse and early intervention may prevent the problem from turning into an addiction. […] Prescription drug abuse is highest among teens and young adults. […] Prescription drug abuse in older adults is a growing problem, especially when they combine drugs with alcohol. […] Abusing prescription drugs can cause a number of problems. Prescription drugs can be especially dangerous and even lead to death when taken in high doses, when combined with other prescription drugs or certain over-the-counter medicines, or when taken with alcohol or illegal or recreational drugs.
- #2 The Truth about Prescription Drug Abusehttps://www.heraldopenaccess.us/openaccess/the-truth-about-prescription-drug-abuse
Abuse of prescription medicines is defined as using them for purposes other than those for which they were intended or in a way that is not authorized by a medical expert. […] Prescription drug abuse can have detrimental effects on a person’s health and wellbeing. Addiction, overdosing, and even death may result from this. […] Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Prescription drug abuse can have several negative effects on the user’s health and well-being. […] The serious misuse of prescription drugs has also resulted in significant increases in health care costs. […] The negative consequences of abused prescription drugs are reflected in key indicators of opioid painkiller abuse that have risen over the years.
- #3 Prescription drug addiction – Wikipediahttps://en.wikipedia.org/wiki/Prescription_drug_addiction
Prescription drug addiction is the chronic, repeated use of a prescription drug in ways other than prescribed for, including using someone else’s prescription. […] The classes of medications most commonly abused are opioids, central nervous system (CNS) depressants and central nervous stimulants. […] Prescription drug addiction was recognized as a significant public health and law enforcement problem worldwide in the past decade due to its medical and social consequences. […] Changes in the pain management including more liberal opioids prescription for chronic pain conditions, prescription of higher doses and the development of more potent opioid drugs play an important role contributing to the current epidemic of prescription opioid addiction. […] Key pharmacological factors associated with drug addiction include: high frequency of drug use, high doses administered, rapid rate of onset of action, high drug potency.
- #4 Prescription drug abuse – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/symptoms-causes/syc-20376813
Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Early identification of prescription drug abuse and early intervention may prevent the problem from turning into an addiction. […] Prescription drug abuse is highest among teens and young adults. […] Prescription drug abuse in older adults is a growing problem, especially when they combine drugs with alcohol. […] Abusing prescription drugs can cause a number of problems. Prescription drugs can be especially dangerous and even lead to death when taken in high doses, when combined with other prescription drugs or certain over-the-counter medicines, or when taken with alcohol or illegal or recreational drugs.
- #5 Prescription drug abuse – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/symptoms-causes/syc-20376813
Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Early identification of prescription drug abuse and early intervention may prevent the problem from turning into an addiction. […] Prescription drug abuse is highest among teens and young adults. […] Prescription drug abuse in older adults is a growing problem, especially when they combine drugs with alcohol. […] Abusing prescription drugs can cause a number of problems. Prescription drugs can be especially dangerous and even lead to death when taken in high doses, when combined with other prescription drugs or certain over-the-counter medicines, or when taken with alcohol or illegal or recreational drugs.
- #6 Drugs, Brains, and Behavior: The Science of Addiction: Drugs and the Brain | NIDAhttps://nida.nih.gov/publications/drugs-brains-behavior-science-addiction/drugs-brain
Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body. This allows the drugs to attach onto and activate the neurons. Although these drugs mimic the brains own chemicals, they dont activate neurons in the same way as a natural neurotransmitter, and they lead to abnormal messages being sent through the network. […] Other drugs, such as amphetamine or cocaine, can cause the neurons to release abnormally large amounts of natural neurotransmitters or prevent the normal recycling of these brain chemicals by interfering with transporters. This too amplifies or disrupts the normal communication between neurons. […] Some drugs like opioids also disrupt other parts of the brain, such as the brain stem, which controls basic functions critical to life, including heart rate, breathing, and sleeping. This interference explains why overdoses can cause depressed breathing and death.
- #7 Drugs, Brains, and Behavior: The Science of Addiction: Drugs and the Brain | NIDAhttps://nida.nih.gov/publications/drugs-brains-behavior-science-addiction/drugs-brain
Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body. This allows the drugs to attach onto and activate the neurons. Although these drugs mimic the brains own chemicals, they dont activate neurons in the same way as a natural neurotransmitter, and they lead to abnormal messages being sent through the network. […] Other drugs, such as amphetamine or cocaine, can cause the neurons to release abnormally large amounts of natural neurotransmitters or prevent the normal recycling of these brain chemicals by interfering with transporters. This too amplifies or disrupts the normal communication between neurons. […] Some drugs like opioids also disrupt other parts of the brain, such as the brain stem, which controls basic functions critical to life, including heart rate, breathing, and sleeping. This interference explains why overdoses can cause depressed breathing and death.
- #8 Drugs, Brains, and Behavior: The Science of Addiction: Drugs and the Brain | NIDAhttps://nida.nih.gov/publications/drugs-brains-behavior-science-addiction/drugs-brain
Drugs interfere with the way neurons send, receive, and process signals via neurotransmitters. Some drugs, such as marijuana and heroin, can activate neurons because their chemical structure mimics that of a natural neurotransmitter in the body. This allows the drugs to attach onto and activate the neurons. Although these drugs mimic the brains own chemicals, they dont activate neurons in the same way as a natural neurotransmitter, and they lead to abnormal messages being sent through the network. […] Other drugs, such as amphetamine or cocaine, can cause the neurons to release abnormally large amounts of natural neurotransmitters or prevent the normal recycling of these brain chemicals by interfering with transporters. This too amplifies or disrupts the normal communication between neurons. […] Some drugs like opioids also disrupt other parts of the brain, such as the brain stem, which controls basic functions critical to life, including heart rate, breathing, and sleeping. This interference explains why overdoses can cause depressed breathing and death.
- #9 How an Addicted Brain Works > News > Yale Medicinehttps://www.yalemedicine.org/news/how-an-addicted-brain-works
Addiction is now understood to be a brain disease. […] When a person develops an addiction to a substance, its because the brain has started to change. This happens because addictive substances trigger an outsized response when they reach the brain. Instead of a simple, pleasurable surge of dopamine, many drugs of abusesuch as opioids, cocaine, or nicotinecause dopamine to flood the reward pathway, 10 times more than a natural reward. […] The brain remembers this surge and associates it with the addictive substance. However, with chronic use of the substance, over time the brains circuits adapt and become less sensitive to dopamine. Achieving that pleasurable sensation becomes increasingly important, but at the same time, you build tolerance and need more and more of that substance to generate the level of high you crave.
- #10 How an Addicted Brain Works > News > Yale Medicinehttps://www.yalemedicine.org/news/how-an-addicted-brain-works
Addiction is now understood to be a brain disease. […] When a person develops an addiction to a substance, its because the brain has started to change. This happens because addictive substances trigger an outsized response when they reach the brain. Instead of a simple, pleasurable surge of dopamine, many drugs of abusesuch as opioids, cocaine, or nicotinecause dopamine to flood the reward pathway, 10 times more than a natural reward. […] The brain remembers this surge and associates it with the addictive substance. However, with chronic use of the substance, over time the brains circuits adapt and become less sensitive to dopamine. Achieving that pleasurable sensation becomes increasingly important, but at the same time, you build tolerance and need more and more of that substance to generate the level of high you crave.
- #11 How an Addicted Brain Works > News > Yale Medicinehttps://www.yalemedicine.org/news/how-an-addicted-brain-works
Addiction is now understood to be a brain disease. […] When a person develops an addiction to a substance, its because the brain has started to change. This happens because addictive substances trigger an outsized response when they reach the brain. Instead of a simple, pleasurable surge of dopamine, many drugs of abusesuch as opioids, cocaine, or nicotinecause dopamine to flood the reward pathway, 10 times more than a natural reward. […] The brain remembers this surge and associates it with the addictive substance. However, with chronic use of the substance, over time the brains circuits adapt and become less sensitive to dopamine. Achieving that pleasurable sensation becomes increasingly important, but at the same time, you build tolerance and need more and more of that substance to generate the level of high you crave.
- #12 Prescription drug abuse – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/symptoms-causes/syc-20376813
Because commonly abused prescription drugs activate the brain’s reward center, it’s possible to develop physical dependence and addiction. […] Physical dependence, also called drug tolerance, is the body’s response to long-term use of a drug. […] People who are addicted to a drug can have physical dependence, but they also compulsively seek a drug and continue to use it even when that drug causes major problems in their lives.
- #13 Prescription drug abuse – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/symptoms-causes/syc-20376813
Because commonly abused prescription drugs activate the brain’s reward center, it’s possible to develop physical dependence and addiction. […] Physical dependence, also called drug tolerance, is the body’s response to long-term use of a drug. […] People who are addicted to a drug can have physical dependence, but they also compulsively seek a drug and continue to use it even when that drug causes major problems in their lives.
- #14 Opioid Abuse: Practice Essentials, Background, Pathophysiologyhttps://emedicine.medscape.com/article/287790-overview
Opioids act by binding to opioid receptors on neurons distributed throughout the nervous system and immune system. Four major types of opioid receptors have been identified: mu, kappa, delta, and the more recently identified OFQ/N. […] Understanding the role of endogenous peptides allows us to understand why medications and drugs that bind to opioid receptors have such profound effects on so many organ systems and bodily functions. […] More than 20 clinically available medications bind opioid receptors. Most of these are prototypical mu receptor full agonists (capable of producing a maximal response at mu receptor subtypes in opioid-sensitive systems), and are associated with the following constellation of effects: Pain relief, Mood alteration (often producing euphoria and decreased anxiety), Respiratory depression (can cause death in overdose), Decreased gastrointestinal motility (can cause constipation), Cough suppression, Suppression of corticotropin-releasing factor and adrenocorticotropin hormone, Pinpoint pupils (miosis), Nausea, vomiting, pruritis (less common).
- #15 Opioid Abuse: Practice Essentials, Background, Pathophysiologyhttps://emedicine.medscape.com/article/287790-overview
Opioids act by binding to opioid receptors on neurons distributed throughout the nervous system and immune system. Four major types of opioid receptors have been identified: mu, kappa, delta, and the more recently identified OFQ/N. […] Understanding the role of endogenous peptides allows us to understand why medications and drugs that bind to opioid receptors have such profound effects on so many organ systems and bodily functions. […] More than 20 clinically available medications bind opioid receptors. Most of these are prototypical mu receptor full agonists (capable of producing a maximal response at mu receptor subtypes in opioid-sensitive systems), and are associated with the following constellation of effects: Pain relief, Mood alteration (often producing euphoria and decreased anxiety), Respiratory depression (can cause death in overdose), Decreased gastrointestinal motility (can cause constipation), Cough suppression, Suppression of corticotropin-releasing factor and adrenocorticotropin hormone, Pinpoint pupils (miosis), Nausea, vomiting, pruritis (less common).
- #16 Opioid Abuse: Practice Essentials, Background, Pathophysiologyhttps://emedicine.medscape.com/article/287790-overview
Almost all abused opioids are prototypical mu agonists. The euphoria associated with mu receptor activation is often termed a high. Moreover, when opioids are injected or inhaled, levels in the brain rise rapidly, causing a rush or thrill. The rush is a brief, intense, usually pleasurable sensation, which is followed by a longer-lasting high. When opioids are used chronically, tolerance and physical dependence occur. Over time, those with physiologic dependence often try to avoid unpleasant withdrawal symptoms rather than seeking the pleasurable sensations associated with initial use of opioids. […] Mechanisms of tolerance and withdrawal include but are not limited to the following: In response to long-term exposure to relatively high doses of exogenous opioids, cells internalize their mu and delta opioid receptors. Therefore, increased opioid levels and/or increased opioid potency are necessary to generate the same effect on fewer receptors (tolerance). Similarly, once the exogenous opioids are removed from the system, the remaining endogenous opioids are unable to sufficiently activate the small number of remaining receptors (withdrawal). […] There is evidence that long-term administration of opioids can permanently alter the density of dendritic spines in certain neurons, and these permanent changes may contribute to long-lasting vulnerability to relapse.
- #17 Benzodiazepines: Another prescription drug problemhttps://journalistsresource.org/politics-and-government/benzodiazepines-what-journalists-should-know/
Benzodiazepines, a class of anti-anxiety drugs, are commonly-prescribed medications with the potential for abuse, addiction and overdose. […] People dont appreciate that benzodiazepines are addictive and that people abuse them, said Dr. Anna Lembke, a psychiatry professor at Stanford Medical School. In a phone call with Journalists Resource, she said that, just as with alcohol, benzodiazepines can be taken to achieve a state of intoxication. […] Benzodiazepines bind to gamma-aminobutyric acid (GABA) receptors in the brain. GABA is an inhibitory neurotransmitter; in other words, it inhibits brain activity. Turning the power down in the brain feels like sleepiness and calm. […] Benzodiazepines are accompanied by a number of side effects, including tolerance (reduced sensitivity) for the drug, cognitive impairment, anterograde amnesia (the inability to remember events that occurred after taking the drug), increased risk of Alzheimers disease, increased risk of falls (particularly among the elderly), and, most notably, dependence, abuse and overdose. Benzodiazepines are similar to opioids, cannabinoids, and the club drug gamma-hydroxybutyrate (GHB) insofar as the same neural mechanism underlies their addictiveness, according to research published in Nature.
- #18 Benzodiazepines: Another prescription drug problemhttps://journalistsresource.org/politics-and-government/benzodiazepines-what-journalists-should-know/
Benzodiazepines, a class of anti-anxiety drugs, are commonly-prescribed medications with the potential for abuse, addiction and overdose. […] People dont appreciate that benzodiazepines are addictive and that people abuse them, said Dr. Anna Lembke, a psychiatry professor at Stanford Medical School. In a phone call with Journalists Resource, she said that, just as with alcohol, benzodiazepines can be taken to achieve a state of intoxication. […] Benzodiazepines bind to gamma-aminobutyric acid (GABA) receptors in the brain. GABA is an inhibitory neurotransmitter; in other words, it inhibits brain activity. Turning the power down in the brain feels like sleepiness and calm. […] Benzodiazepines are accompanied by a number of side effects, including tolerance (reduced sensitivity) for the drug, cognitive impairment, anterograde amnesia (the inability to remember events that occurred after taking the drug), increased risk of Alzheimers disease, increased risk of falls (particularly among the elderly), and, most notably, dependence, abuse and overdose. Benzodiazepines are similar to opioids, cannabinoids, and the club drug gamma-hydroxybutyrate (GHB) insofar as the same neural mechanism underlies their addictiveness, according to research published in Nature.
- #19 Benzodiazepines: Another prescription drug problemhttps://journalistsresource.org/politics-and-government/benzodiazepines-what-journalists-should-know/
Even taking benzodiazepines in adherence to a prescribing physicians instructions can lead to dependence. Withdrawal symptoms are likely among patients who have taken benzodiazepines continuously for longer than a few weeks. […] The way that theyre prescribed and continued is contrary to the evidence in the medical literature, Lembke said. She noted that the evidence indicates benzodiazepines are effective and useful only in the short term, and typically at low doses. Theres no evidence that benzodiazepines taken long term work for anxiety, she said. […] Benzodiazepine abuse on its own can lead to overdose and death, but overdose deaths typically occur in combination with other substances generally other central nervous system depressants, which, like benzodiazepines, can lead to the life-threatening effect of slowed or stopped breathing. […] In August 2016, the Food and Drug Administration issued a requirement that opioids and benzodiazepines carry a black-box warning about the risks associated with using these substances together.
- #20 Benzodiazepines: Another prescription drug problemhttps://journalistsresource.org/politics-and-government/benzodiazepines-what-journalists-should-know/
Even taking benzodiazepines in adherence to a prescribing physicians instructions can lead to dependence. Withdrawal symptoms are likely among patients who have taken benzodiazepines continuously for longer than a few weeks. […] The way that theyre prescribed and continued is contrary to the evidence in the medical literature, Lembke said. She noted that the evidence indicates benzodiazepines are effective and useful only in the short term, and typically at low doses. Theres no evidence that benzodiazepines taken long term work for anxiety, she said. […] Benzodiazepine abuse on its own can lead to overdose and death, but overdose deaths typically occur in combination with other substances generally other central nervous system depressants, which, like benzodiazepines, can lead to the life-threatening effect of slowed or stopped breathing. […] In August 2016, the Food and Drug Administration issued a requirement that opioids and benzodiazepines carry a black-box warning about the risks associated with using these substances together.
- #21 Prescription Drug Abuse (for Teens) | Nemours KidsHealthhttps://kidshealth.org/en/teens/prescription-drug-abuse.html
Taking prescription drugs in a way that hasn’t been recommended by a doctor can be more dangerous than people think. In fact, it’s drug abuse. And it’s illegal, just like taking street drugs. […] Opioids attach to opioid receptors in the central nervous system (the brain and the spinal cord), preventing the brain from receiving pain messages. […] CNS depressants slow down brain activity by making changes in brain chemicals. The result is a drowsy or calming effect. […] Stimulants increase brain activity, resulting in greater alertness, attention, and energy. […] Opioid abuse can lead to mood and behavior changes, trouble thinking clearly, breathing problems, and even a coma or death. […] CNS depressant abuse is risky too. […] Stimulant abuse (like with some ADHD drugs) may cause heart problems, seizures, panic attacks, paranoia, and violent behavior. […] The dangers of prescription drug abuse can be even worse if people take drugs in a way they weren’t intended to be used. […] Probably the most common risk of prescription drug abuse is addiction. People who abuse medicines can become addicted as easily as if they were taking street drugs.
- #22 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Stimulant abuse — for instance, by taking them in higher doses or by crushing pills and snorting them — can lead to addiction. High doses can raise your body temperature. Misusing stimulants or using them along with decongestants may cause uneven heartbeat. […] Treatment for opioid addiction includes medications that can help people get control without a high chance of addiction. […] Experts believe that medication-assisted treatment with methadone, naltrexone, or suboxone and cognitive behavioral therapy is the best treatment for most patients who have an opioid addiction. […] Prescription drug abuse can have dangerous or deadly effects, especially if you take them along with the drugs listed above: Opioids may cause vomiting, breathing problems, a coma, or death. […] Some experts think that more people are abusing prescription medications because there are more drugs available. Doctors report writing more prescriptions than ever before.
- #23 Opioid Abuse: Practice Essentials, Background, Pathophysiologyhttps://emedicine.medscape.com/article/287790-overview
Almost all abused opioids are prototypical mu agonists. The euphoria associated with mu receptor activation is often termed a high. Moreover, when opioids are injected or inhaled, levels in the brain rise rapidly, causing a rush or thrill. The rush is a brief, intense, usually pleasurable sensation, which is followed by a longer-lasting high. When opioids are used chronically, tolerance and physical dependence occur. Over time, those with physiologic dependence often try to avoid unpleasant withdrawal symptoms rather than seeking the pleasurable sensations associated with initial use of opioids. […] Mechanisms of tolerance and withdrawal include but are not limited to the following: In response to long-term exposure to relatively high doses of exogenous opioids, cells internalize their mu and delta opioid receptors. Therefore, increased opioid levels and/or increased opioid potency are necessary to generate the same effect on fewer receptors (tolerance). Similarly, once the exogenous opioids are removed from the system, the remaining endogenous opioids are unable to sufficiently activate the small number of remaining receptors (withdrawal). […] There is evidence that long-term administration of opioids can permanently alter the density of dendritic spines in certain neurons, and these permanent changes may contribute to long-lasting vulnerability to relapse.
- #24 Opioid Abuse: Practice Essentials, Background, Pathophysiologyhttps://emedicine.medscape.com/article/287790-overview
Almost all abused opioids are prototypical mu agonists. The euphoria associated with mu receptor activation is often termed a high. Moreover, when opioids are injected or inhaled, levels in the brain rise rapidly, causing a rush or thrill. The rush is a brief, intense, usually pleasurable sensation, which is followed by a longer-lasting high. When opioids are used chronically, tolerance and physical dependence occur. Over time, those with physiologic dependence often try to avoid unpleasant withdrawal symptoms rather than seeking the pleasurable sensations associated with initial use of opioids. […] Mechanisms of tolerance and withdrawal include but are not limited to the following: In response to long-term exposure to relatively high doses of exogenous opioids, cells internalize their mu and delta opioid receptors. Therefore, increased opioid levels and/or increased opioid potency are necessary to generate the same effect on fewer receptors (tolerance). Similarly, once the exogenous opioids are removed from the system, the remaining endogenous opioids are unable to sufficiently activate the small number of remaining receptors (withdrawal). […] There is evidence that long-term administration of opioids can permanently alter the density of dendritic spines in certain neurons, and these permanent changes may contribute to long-lasting vulnerability to relapse.
- #25 Withdrawal Syndromes: Practice Essentials, Pathophysiology, Epidemiologyhttps://emedicine.medscape.com/article/819502-overview
Ethanol inhibits excitatory neurons by decreasing the activity of N-methyl-D-aspartate (NMDA, glutamate subtype) receptors. Long-term use results in upregulation of NMDA receptors, an adaptation that causes tolerance. The unmasking of the increased neuroexcitatory tone contributes to withdrawal seizures and other symptoms when alcohol intake is decreased or stopped. […] In the short-term, ethanol inhibits opioid binding to p-opioid receptors, and long-term use results in upregulation of opioid receptors. Opioid receptors in the nucleus accumbens and in the ventral tegmental area of the brain modulate ethanol-induced dopamine release, which produces alcohol craving and explains the use of opioid antagonists to prevent this craving. […] Other GABAA receptor agonists, such as benzodiazepines, barbiturates, and volatile solvents, produce a withdrawal syndrome through some of the same mechanisms implicated in ethanol withdrawal. Modulatory changes in the GABAA receptor results in a decrease in GABA-ergic neurotransmission and decreased inhibitory control of excitatory neurotransmission.
- #26 Withdrawal Syndromes: Practice Essentials, Pathophysiology, Epidemiologyhttps://emedicine.medscape.com/article/819502-overview
Opioid withdrawal is mediated at both the receptor level and via downstream cellular and nerve network adaptations. At the receptor level, opioid tolerance induces receptor internalization with decreased receptor expression on the cell surface and receptor densensitization, whereby stimulation of the receptor is less efficiently coupled to second messenger activation. […] At the cellular level, opioid tolerance and withdrawal is modulated by alterations in kinase cascades, which modulate the production and effects of second messengers such as cyclic adenosine monophosphate (cAMP). At the nerve network level, chronic opioid agonism results in homeostatic adaptations to other neurons throughout the neural network; alterations in neuronal, synaptic, and dendritic architecture; and changes in glial function.
- #27 Pregabalin: Potential for Addiction and a Possible Glutamatergic Mechanism | Scientific Reportshttps://www.nature.com/articles/s41598-019-51556-4
Drug addiction remains a prevalent and fatal disease worldwide that carries significant social and economic impacts. […] Drug seeking behavior and chronic drug use are associated with deficits in glutamate clearance and activation of postsynaptic glutamatergic receptors. […] Glutamate homeostasis is maintained by glutamate transporter type-1 (GLT-1), which plays a vital role in clearing the released glutamate from synapses and drug seeking behavior. […] The nucleus accumbens (NAc) is involved in the reinforcing and rewarding effects of several drugs of abuse. […] Disturbances in glutamate homeostasis in the NAc have been shown to be associated with drug seeking behavior and chronic drug use. […] The release of glutamate from prefrontal cortex (PFC) projections into the NAc has been shown to mediate drug seeking behavior in previous studies.
- #28 Pregabalin: Potential for Addiction and a Possible Glutamatergic Mechanism | Scientific Reportshttps://www.nature.com/articles/s41598-019-51556-4
Drug addiction remains a prevalent and fatal disease worldwide that carries significant social and economic impacts. […] Drug seeking behavior and chronic drug use are associated with deficits in glutamate clearance and activation of postsynaptic glutamatergic receptors. […] Glutamate homeostasis is maintained by glutamate transporter type-1 (GLT-1), which plays a vital role in clearing the released glutamate from synapses and drug seeking behavior. […] The nucleus accumbens (NAc) is involved in the reinforcing and rewarding effects of several drugs of abuse. […] Disturbances in glutamate homeostasis in the NAc have been shown to be associated with drug seeking behavior and chronic drug use. […] The release of glutamate from prefrontal cortex (PFC) projections into the NAc has been shown to mediate drug seeking behavior in previous studies.
- #29 Pregabalin: Potential for Addiction and a Possible Glutamatergic Mechanism | Scientific Reportshttps://www.nature.com/articles/s41598-019-51556-4
Drug addiction remains a prevalent and fatal disease worldwide that carries significant social and economic impacts. […] Drug seeking behavior and chronic drug use are associated with deficits in glutamate clearance and activation of postsynaptic glutamatergic receptors. […] Glutamate homeostasis is maintained by glutamate transporter type-1 (GLT-1), which plays a vital role in clearing the released glutamate from synapses and drug seeking behavior. […] The nucleus accumbens (NAc) is involved in the reinforcing and rewarding effects of several drugs of abuse. […] Disturbances in glutamate homeostasis in the NAc have been shown to be associated with drug seeking behavior and chronic drug use. […] The release of glutamate from prefrontal cortex (PFC) projections into the NAc has been shown to mediate drug seeking behavior in previous studies.
- #30 Pregabalin: Potential for Addiction and a Possible Glutamatergic Mechanism | Scientific Reportshttps://www.nature.com/articles/s41598-019-51556-4
It is noteworthy that glutamate homeostasis is controlled by a number of glutamate receptors and transporters. […] One of these transporters is glutamate transporter type-1 (GLT-1) which can clear the majority of the synaptic glutamate. […] Interestingly, GLT-1 expression was found to be downregulated instantly in cocaine self-administration model. […] The drug seeking effects found in several drugs of abuse have been consistently reported to be mediated by glutamatergic mechanism. […] Our results suggest that pregabalin at higher doses [60mg, and 90mg] may induce addiction partly by downregulating GLT-1 expression and thereby decreasing glutamate uptake at the synaptic cleft. […] Treatment with CEF has been reported to prevent drug seeking behavior caused by, in part, decreased GLT-1 expression in methamphetamine, cocaine, ethanol, nicotine, and heroin dependence. […] Therefore, pregabalin seeking at the addictive doses of [60mg, and 90mg] might be mediated by altering GLT-1 expression as the drug seeking effects of pregabalin was eliminated by CEF pretreatment in the present study.
- #31 Pregabalin: Potential for Addiction and a Possible Glutamatergic Mechanism | Scientific Reportshttps://www.nature.com/articles/s41598-019-51556-4
It is noteworthy that glutamate homeostasis is controlled by a number of glutamate receptors and transporters. […] One of these transporters is glutamate transporter type-1 (GLT-1) which can clear the majority of the synaptic glutamate. […] Interestingly, GLT-1 expression was found to be downregulated instantly in cocaine self-administration model. […] The drug seeking effects found in several drugs of abuse have been consistently reported to be mediated by glutamatergic mechanism. […] Our results suggest that pregabalin at higher doses [60mg, and 90mg] may induce addiction partly by downregulating GLT-1 expression and thereby decreasing glutamate uptake at the synaptic cleft. […] Treatment with CEF has been reported to prevent drug seeking behavior caused by, in part, decreased GLT-1 expression in methamphetamine, cocaine, ethanol, nicotine, and heroin dependence. […] Therefore, pregabalin seeking at the addictive doses of [60mg, and 90mg] might be mediated by altering GLT-1 expression as the drug seeking effects of pregabalin was eliminated by CEF pretreatment in the present study.
- #32 Prescription drug addiction – Wikipediahttps://en.wikipedia.org/wiki/Prescription_drug_addiction
Prescription drug addiction is the chronic, repeated use of a prescription drug in ways other than prescribed for, including using someone else’s prescription. […] The classes of medications most commonly abused are opioids, central nervous system (CNS) depressants and central nervous stimulants. […] Prescription drug addiction was recognized as a significant public health and law enforcement problem worldwide in the past decade due to its medical and social consequences. […] Changes in the pain management including more liberal opioids prescription for chronic pain conditions, prescription of higher doses and the development of more potent opioid drugs play an important role contributing to the current epidemic of prescription opioid addiction. […] Key pharmacological factors associated with drug addiction include: high frequency of drug use, high doses administered, rapid rate of onset of action, high drug potency.
- #33 Prescription drug addiction – Wikipediahttps://en.wikipedia.org/wiki/Prescription_drug_addiction
The above over-prescription practices can lead to the aggravation of prescription drug addiction. […] Patients who have been prescribed medications to treat a health condition or disorder are shown to be more vulnerable to prescription drug abuse and addiction, especially when the prescribed medicine falls into the same drug classes of common illicit drugs. […] Misuse of opioid analgesics is frequently associated with mental health disorder, including depression, posttraumatic stress disorder, and anxiety disorders. […] Addiction to pharmaceutical stimulants have been predominantly among adolescents and young adults. […] Addiction may also deteriorate academic or work performance and worsen relationships.
- #34 Drug addiction (substance use disorder) – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/drug-addiction/symptoms-causes/syc-20365112
Drug addiction, also called substance use disorder, is a disease that affects a person’s brain and behavior and leads to an inability to control the use of a legal or illegal drug or medicine. […] The risk of addiction and how fast you become addicted varies by drug. Some drugs, such as opioid painkillers, have a higher risk and cause addiction more quickly than others. […] Physical addiction appears to occur when repeated use of a drug changes the way your brain feels pleasure. The addicting drug causes physical changes to some nerve cells (neurons) in your brain. Neurons use chemicals called neurotransmitters to communicate. These changes can remain long after you stop using the drug.
- #35 Prescription drug abuse in Europe is a bigger problem than previously thoughthttps://www.biomedcentral.com/about/press-centre/science-press-releases/04-08-16
Having been prescribed a pain reliever was associated with an eight times higher risk of subsequent nonmedical use of prescription pain relievers. The risk was ten times higher for sedatives and seven times higher for stimulants. […] Identification of the scope and prevalence of nonmedical prescription drug use in the EU is an important first step in building a worldwide system that can be used to monitor trends, track risk and protective factors and to develop targeted interventions aimed at reducing the risk of nonmedical prescription drug use, according to the researchers.
- #36 Prescription drug addiction – Wikipediahttps://en.wikipedia.org/wiki/Prescription_drug_addiction
The above over-prescription practices can lead to the aggravation of prescription drug addiction. […] Patients who have been prescribed medications to treat a health condition or disorder are shown to be more vulnerable to prescription drug abuse and addiction, especially when the prescribed medicine falls into the same drug classes of common illicit drugs. […] Misuse of opioid analgesics is frequently associated with mental health disorder, including depression, posttraumatic stress disorder, and anxiety disorders. […] Addiction to pharmaceutical stimulants have been predominantly among adolescents and young adults. […] Addiction may also deteriorate academic or work performance and worsen relationships.
- #37 CDC Grand Rounds: Prescription Drug Overdoses — a U.S. Epidemichttps://www.cdc.gov/mmwr/preview/mmwrhtml/mm6101a3.htm
In 2007, approximately 27,000 unintentional drug overdose deaths occurred in the United States, one death every 19 minutes. Prescription drug abuse is the fastest growing drug problem in the United States. The increase in unintentional drug overdose death rates in recent years has been driven by increased use of a class of prescription drugs called opioid analgesics. […] Persons who have mental illness are overrepresented among both those who are prescribed opioids and those who overdose on them. Further defining populations at greater risk is critical for development and implementation of effective interventions. The two main populations in the United States at risk for prescription drug overdose are the approximately 9 million persons who report long-term medical use of opioids, and the roughly 5 million persons who report nonmedical use (i.e., use without a prescription or medical need), in the past month.
- #38 Prescription Drug Abuse Recovery | NCTChttps://newchoicestc.com/blog/prescription-drug-abuse/
Mental health conditions often coexist with prescription drug abuse, creating a complex interplay that can complicate treatment and recovery. Conditions like anxiety, depression, and post-traumatic stress disorder (PTSD) can lead people to self-medicate with prescription drugs. […] Effective treatment for prescription drug abuse must address both the substance use and the underlying mental health conditions. Integrated treatment plans that combine medication management with therapy can provide a comprehensive approach to recovery.
- #39 Prescription Drug Abuse Recovery | NCTChttps://newchoicestc.com/blog/prescription-drug-abuse/
Mental health conditions often coexist with prescription drug abuse, creating a complex interplay that can complicate treatment and recovery. Conditions like anxiety, depression, and post-traumatic stress disorder (PTSD) can lead people to self-medicate with prescription drugs. […] Effective treatment for prescription drug abuse must address both the substance use and the underlying mental health conditions. Integrated treatment plans that combine medication management with therapy can provide a comprehensive approach to recovery.
- #40 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Stimulant abuse — for instance, by taking them in higher doses or by crushing pills and snorting them — can lead to addiction. High doses can raise your body temperature. Misusing stimulants or using them along with decongestants may cause uneven heartbeat. […] Treatment for opioid addiction includes medications that can help people get control without a high chance of addiction. […] Experts believe that medication-assisted treatment with methadone, naltrexone, or suboxone and cognitive behavioral therapy is the best treatment for most patients who have an opioid addiction. […] Prescription drug abuse can have dangerous or deadly effects, especially if you take them along with the drugs listed above: Opioids may cause vomiting, breathing problems, a coma, or death. […] Some experts think that more people are abusing prescription medications because there are more drugs available. Doctors report writing more prescriptions than ever before.
- #41 Prescription Drug Abuse Recovery | NCTChttps://newchoicestc.com/blog/prescription-drug-abuse/
Prescription drug abuse has become a significant public health crisis in recent years. This issue involves the misuse of medications that are legally prescribed for various health conditions. […] Prescription drug abuse occurs when someone takes medication in a way that is not prescribed or for reasons other than its intended purpose. […] This problem is complex and can have various consequences. It can lead to addiction, which is a chronic disorder characterized by compulsive drug seeking and use despite harmful consequences. […] The misuse of prescription drugs can also result in physical dependence, where the body adapts to the drug. This leads to withdrawal symptoms when not taking it. Tolerance can develop as well, meaning people need higher doses to achieve the same effect. […] Healthcare providers may prescribe more medication than necessary, often due to the pressure to manage pain or other conditions quickly. This practice can lead to an excess of unused medications, increasing the risk of misuse.
- #42 CDC Grand Rounds: Prescription Drug Overdoses — a U.S. Epidemichttps://www.cdc.gov/mmwr/preview/mmwrhtml/mm6101a3.htm
Persons who abuse opioids have learned to exploit this new practitioner sensitivity to patient pain, and clinicians struggle to treat patients without overprescribing these drugs. […] These data suggest that prevention of opioid overdose deaths should focus on strategies that target 1) high-dosage medical users and 2) persons who seek care from multiple doctors, receive high doses, and likely are involved in drug diversion. […] Evidence-based guidelines can educate prescribers regarding the under-appreciated risks and frequently exaggerated benefits of high-dose opioid therapy. Such guidelines especially are needed for emergency departments because persons at greater risk for overdose frequently visit emergency departments seeking drugs. […] A public health approach to the problem of prescription drug overdose also should include secondary and tertiary prevention measures to improve emergency and long-term treatment. Overdose „harm reduction” programs emphasize broader distribution (to nonmedical users) of an opioid antidote, naloxone, that can be used in an emergency by anyone witnessing an overdose.
- #43 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
Prescription drug diversion involves the unlawful channeling of regulated pharmaceuticals from legal sources to the illicit marketplace, and can occur along all points in the drug delivery process, from the original manufacturing site to the wholesale distributor, the physician’s office, the retail pharmacy, or the patient. […] Diversion can occur in many ways, including: the illegal sale of prescriptions by physicians and those who are referred to on the street as loose pharmacists; doctor shopping by individuals who visit numerous physicians to obtain multiple prescriptions; theft, forgery, or alteration of prescriptions by health care workers and patients; robberies and thefts from manufacturers, distributors, and pharmacies; and thefts of institutional drug supplies. […] Furthermore, there is growing evidence that the diversion of significant amounts of prescription opioids and benzodiazepines occurs through residential burglaries as well as cross-border smuggling at both retail and wholesale levels.
- #44 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
Prescription drug diversion involves the unlawful channeling of regulated pharmaceuticals from legal sources to the illicit marketplace, and can occur along all points in the drug delivery process, from the original manufacturing site to the wholesale distributor, the physician’s office, the retail pharmacy, or the patient. […] Diversion can occur in many ways, including: the illegal sale of prescriptions by physicians and those who are referred to on the street as loose pharmacists; doctor shopping by individuals who visit numerous physicians to obtain multiple prescriptions; theft, forgery, or alteration of prescriptions by health care workers and patients; robberies and thefts from manufacturers, distributors, and pharmacies; and thefts of institutional drug supplies. […] Furthermore, there is growing evidence that the diversion of significant amounts of prescription opioids and benzodiazepines occurs through residential burglaries as well as cross-border smuggling at both retail and wholesale levels.
- #45 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
Prescription drug diversion involves the unlawful channeling of regulated pharmaceuticals from legal sources to the illicit marketplace, and can occur along all points in the drug delivery process, from the original manufacturing site to the wholesale distributor, the physician’s office, the retail pharmacy, or the patient. […] Diversion can occur in many ways, including: the illegal sale of prescriptions by physicians and those who are referred to on the street as loose pharmacists; doctor shopping by individuals who visit numerous physicians to obtain multiple prescriptions; theft, forgery, or alteration of prescriptions by health care workers and patients; robberies and thefts from manufacturers, distributors, and pharmacies; and thefts of institutional drug supplies. […] Furthermore, there is growing evidence that the diversion of significant amounts of prescription opioids and benzodiazepines occurs through residential burglaries as well as cross-border smuggling at both retail and wholesale levels.
- #46 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
In addition, recent research has documented diversion through such other channels as: shorting (undercounting) and pilferage by pharmacists and pharmacy employees; recycling of medications by pharmacists and pharmacy employees; medicine cabinet thefts by cleaning and repair personnel in residential settings; theft of guests’ medications by hotel repair and housekeeping staff; and Medicare, Medicaid, and other insurance fraud by patients, pharmacists, and street dealers. […] While doctor shoppers, physicians, and the Internet receive much of the attention regarding diversion, the data reported in this article suggest that there are numerous active street markets involving patients, Medicaid recipients, and pharmacies as well. […] The range of diversion is so broad, furthermore, that answers as to what the major sources of diversion are really depend on who is asked.
- #47 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
In addition, recent research has documented diversion through such other channels as: shorting (undercounting) and pilferage by pharmacists and pharmacy employees; recycling of medications by pharmacists and pharmacy employees; medicine cabinet thefts by cleaning and repair personnel in residential settings; theft of guests’ medications by hotel repair and housekeeping staff; and Medicare, Medicaid, and other insurance fraud by patients, pharmacists, and street dealers. […] While doctor shoppers, physicians, and the Internet receive much of the attention regarding diversion, the data reported in this article suggest that there are numerous active street markets involving patients, Medicaid recipients, and pharmacies as well. […] The range of diversion is so broad, furthermore, that answers as to what the major sources of diversion are really depend on who is asked.
- #48 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
In addition, recent research has documented diversion through such other channels as: shorting (undercounting) and pilferage by pharmacists and pharmacy employees; recycling of medications by pharmacists and pharmacy employees; medicine cabinet thefts by cleaning and repair personnel in residential settings; theft of guests’ medications by hotel repair and housekeeping staff; and Medicare, Medicaid, and other insurance fraud by patients, pharmacists, and street dealers. […] While doctor shoppers, physicians, and the Internet receive much of the attention regarding diversion, the data reported in this article suggest that there are numerous active street markets involving patients, Medicaid recipients, and pharmacies as well. […] The range of diversion is so broad, furthermore, that answers as to what the major sources of diversion are really depend on who is asked.
- #49 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
Federal agencies maintain that diverted drugs enter the illegal market primarily through doctor shoppers, inappropriate prescribing practices by physicians, and improper dispensing by pharmacists. […] By contrast, as a adjunct to a postmarketing surveillance program to monitor the diversion and abuse of oxycodone and a variety of other prescription opioids, in 2005 the authors surveyed diversion investigators in 300 police and regulatory agencies participating in this nationwide surveillance program. […] A primary focus of the groups was to elucidate the sources of abused prescription drugs reaching the streets. […] Among these individuals, the primary sources for acquiring prescription drugs were: street dealers; script doctors; illegal sales in small pharmacies; acquaintances who sell their personal prescriptions; doctor shopping; friends and family members; sex workers’ clients; disability patients; Medicaid recipients; and personal prescriptions intended for the treatment for drug dependence or mental illness.
- #50 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
Federal agencies maintain that diverted drugs enter the illegal market primarily through doctor shoppers, inappropriate prescribing practices by physicians, and improper dispensing by pharmacists. […] By contrast, as a adjunct to a postmarketing surveillance program to monitor the diversion and abuse of oxycodone and a variety of other prescription opioids, in 2005 the authors surveyed diversion investigators in 300 police and regulatory agencies participating in this nationwide surveillance program. […] A primary focus of the groups was to elucidate the sources of abused prescription drugs reaching the streets. […] Among these individuals, the primary sources for acquiring prescription drugs were: street dealers; script doctors; illegal sales in small pharmacies; acquaintances who sell their personal prescriptions; doctor shopping; friends and family members; sex workers’ clients; disability patients; Medicaid recipients; and personal prescriptions intended for the treatment for drug dependence or mental illness.
- #51 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
Federal agencies maintain that diverted drugs enter the illegal market primarily through doctor shoppers, inappropriate prescribing practices by physicians, and improper dispensing by pharmacists. […] By contrast, as a adjunct to a postmarketing surveillance program to monitor the diversion and abuse of oxycodone and a variety of other prescription opioids, in 2005 the authors surveyed diversion investigators in 300 police and regulatory agencies participating in this nationwide surveillance program. […] A primary focus of the groups was to elucidate the sources of abused prescription drugs reaching the streets. […] Among these individuals, the primary sources for acquiring prescription drugs were: street dealers; script doctors; illegal sales in small pharmacies; acquaintances who sell their personal prescriptions; doctor shopping; friends and family members; sex workers’ clients; disability patients; Medicaid recipients; and personal prescriptions intended for the treatment for drug dependence or mental illness.
- #52 Mechanisms of Prescription Drug Diversion Among Drug-Involved Club- and Street-Based Populationshttps://pmc.ncbi.nlm.nih.gov/articles/PMC2879025/
A repeated theme was the involvement of certain pharmacies in Medicaid fraud. […] Most people wouldn’t think of this but at a methadone clinic, everybody that is either looking to get rid of something, or looking to purchase something, will come around a methadone clinic and will come up to you and say, I’ve got Xanax. […] The vast majority of participants reported problems with adherence to ARV medications either sporadically or on a chronic basis, due to side effects or regimen complexity, and most had been approached on multiple occasions and asked to sell their medications. […] The supply chain for diverted ARV medications includes HIV-positive patients, patient recruiters, pill brokers, street drug dealers, local mom and pop pharmacies who are recycling and reselling various medications, and script doctors, who prescribe medications in exchange for payment, even to non-HIV-positive individuals.
- #53 Prescription drug abuse – Symptoms and causes – Mayo Clinichttps://www.mayoclinic.org/diseases-conditions/prescription-drug-abuse/symptoms-causes/syc-20376813
Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Early identification of prescription drug abuse and early intervention may prevent the problem from turning into an addiction. […] Prescription drug abuse is highest among teens and young adults. […] Prescription drug abuse in older adults is a growing problem, especially when they combine drugs with alcohol. […] Abusing prescription drugs can cause a number of problems. Prescription drugs can be especially dangerous and even lead to death when taken in high doses, when combined with other prescription drugs or certain over-the-counter medicines, or when taken with alcohol or illegal or recreational drugs.
- #54 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Prescription drug abuse is when you take a medication for a reason other than why the doctor prescribed it. […] Abusing drugs — even prescription drugs — can change how your brain works. Most people start by choosing to take these medications. But over time, the changes in your brain affect your self-control and your ability to make good decisions. At the same time, you have intense urges to take more drugs. […] Opioids can cause a mild joyful feeling. Some people using them illegally snort or inject them to get that effect faster. Injecting drugs raises your chances of getting diseases like HIV and hepatitis C. […] Taking CNS depressants for a few days or weeks may help you feel calm and sleepy. But after a while, you may need larger doses to get the same feeling. Using them with alcohol can cause slow heartbeat, slow breathing, and death.
- #55 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Prescription drug abuse is when you take a medication for a reason other than why the doctor prescribed it. […] Abusing drugs — even prescription drugs — can change how your brain works. Most people start by choosing to take these medications. But over time, the changes in your brain affect your self-control and your ability to make good decisions. At the same time, you have intense urges to take more drugs. […] Opioids can cause a mild joyful feeling. Some people using them illegally snort or inject them to get that effect faster. Injecting drugs raises your chances of getting diseases like HIV and hepatitis C. […] Taking CNS depressants for a few days or weeks may help you feel calm and sleepy. But after a while, you may need larger doses to get the same feeling. Using them with alcohol can cause slow heartbeat, slow breathing, and death.
- #56 Prescription Drug Abuse (for Teens) | Nemours KidsHealthhttps://kidshealth.org/en/teens/prescription-drug-abuse.html
Taking prescription drugs in a way that hasn’t been recommended by a doctor can be more dangerous than people think. In fact, it’s drug abuse. And it’s illegal, just like taking street drugs. […] Opioids attach to opioid receptors in the central nervous system (the brain and the spinal cord), preventing the brain from receiving pain messages. […] CNS depressants slow down brain activity by making changes in brain chemicals. The result is a drowsy or calming effect. […] Stimulants increase brain activity, resulting in greater alertness, attention, and energy. […] Opioid abuse can lead to mood and behavior changes, trouble thinking clearly, breathing problems, and even a coma or death. […] CNS depressant abuse is risky too. […] Stimulant abuse (like with some ADHD drugs) may cause heart problems, seizures, panic attacks, paranoia, and violent behavior. […] The dangers of prescription drug abuse can be even worse if people take drugs in a way they weren’t intended to be used. […] Probably the most common risk of prescription drug abuse is addiction. People who abuse medicines can become addicted as easily as if they were taking street drugs.
- #57 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Prescription drug abuse is when you take a medication for a reason other than why the doctor prescribed it. […] Abusing drugs — even prescription drugs — can change how your brain works. Most people start by choosing to take these medications. But over time, the changes in your brain affect your self-control and your ability to make good decisions. At the same time, you have intense urges to take more drugs. […] Opioids can cause a mild joyful feeling. Some people using them illegally snort or inject them to get that effect faster. Injecting drugs raises your chances of getting diseases like HIV and hepatitis C. […] Taking CNS depressants for a few days or weeks may help you feel calm and sleepy. But after a while, you may need larger doses to get the same feeling. Using them with alcohol can cause slow heartbeat, slow breathing, and death.
- #58 The Truth about Prescription Drug Abusehttps://www.heraldopenaccess.us/openaccess/the-truth-about-prescription-drug-abuse
Abuse of prescription medicines is defined as using them for purposes other than those for which they were intended or in a way that is not authorized by a medical expert. […] Prescription drug abuse can have detrimental effects on a person’s health and wellbeing. Addiction, overdosing, and even death may result from this. […] Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Prescription drug abuse can have several negative effects on the user’s health and well-being. […] The serious misuse of prescription drugs has also resulted in significant increases in health care costs. […] The negative consequences of abused prescription drugs are reflected in key indicators of opioid painkiller abuse that have risen over the years.
- #59 Prescription Drug Abuse (for Teens) | Nemours KidsHealthhttps://kidshealth.org/en/teens/prescription-drug-abuse.html
Taking prescription drugs in a way that hasn’t been recommended by a doctor can be more dangerous than people think. In fact, it’s drug abuse. And it’s illegal, just like taking street drugs. […] Opioids attach to opioid receptors in the central nervous system (the brain and the spinal cord), preventing the brain from receiving pain messages. […] CNS depressants slow down brain activity by making changes in brain chemicals. The result is a drowsy or calming effect. […] Stimulants increase brain activity, resulting in greater alertness, attention, and energy. […] Opioid abuse can lead to mood and behavior changes, trouble thinking clearly, breathing problems, and even a coma or death. […] CNS depressant abuse is risky too. […] Stimulant abuse (like with some ADHD drugs) may cause heart problems, seizures, panic attacks, paranoia, and violent behavior. […] The dangers of prescription drug abuse can be even worse if people take drugs in a way they weren’t intended to be used. […] Probably the most common risk of prescription drug abuse is addiction. People who abuse medicines can become addicted as easily as if they were taking street drugs.
- #60 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Stimulant abuse — for instance, by taking them in higher doses or by crushing pills and snorting them — can lead to addiction. High doses can raise your body temperature. Misusing stimulants or using them along with decongestants may cause uneven heartbeat. […] Treatment for opioid addiction includes medications that can help people get control without a high chance of addiction. […] Experts believe that medication-assisted treatment with methadone, naltrexone, or suboxone and cognitive behavioral therapy is the best treatment for most patients who have an opioid addiction. […] Prescription drug abuse can have dangerous or deadly effects, especially if you take them along with the drugs listed above: Opioids may cause vomiting, breathing problems, a coma, or death. […] Some experts think that more people are abusing prescription medications because there are more drugs available. Doctors report writing more prescriptions than ever before.
- #61 The Truth about Prescription Drug Abusehttps://www.heraldopenaccess.us/openaccess/the-truth-about-prescription-drug-abuse
Abuse of prescription medicines is defined as using them for purposes other than those for which they were intended or in a way that is not authorized by a medical expert. […] Prescription drug abuse can have detrimental effects on a person’s health and wellbeing. Addiction, overdosing, and even death may result from this. […] Prescription drug abuse is the use of a prescription medicine in a way not intended by the prescriber. […] Prescription drug abuse may become ongoing and compulsive, despite the negative consequences. […] Prescription drug abuse can have several negative effects on the user’s health and well-being. […] The serious misuse of prescription drugs has also resulted in significant increases in health care costs. […] The negative consequences of abused prescription drugs are reflected in key indicators of opioid painkiller abuse that have risen over the years.
- #62 Withdrawal Syndromes: Practice Essentials, Pathophysiology, Epidemiologyhttps://emedicine.medscape.com/article/819502-overview
Opioid withdrawal is mediated at both the receptor level and via downstream cellular and nerve network adaptations. At the receptor level, opioid tolerance induces receptor internalization with decreased receptor expression on the cell surface and receptor densensitization, whereby stimulation of the receptor is less efficiently coupled to second messenger activation. […] At the cellular level, opioid tolerance and withdrawal is modulated by alterations in kinase cascades, which modulate the production and effects of second messengers such as cyclic adenosine monophosphate (cAMP). At the nerve network level, chronic opioid agonism results in homeostatic adaptations to other neurons throughout the neural network; alterations in neuronal, synaptic, and dendritic architecture; and changes in glial function.
- #63 Benzodiazepines: Another prescription drug problemhttps://journalistsresource.org/politics-and-government/benzodiazepines-what-journalists-should-know/
Even taking benzodiazepines in adherence to a prescribing physicians instructions can lead to dependence. Withdrawal symptoms are likely among patients who have taken benzodiazepines continuously for longer than a few weeks. […] The way that theyre prescribed and continued is contrary to the evidence in the medical literature, Lembke said. She noted that the evidence indicates benzodiazepines are effective and useful only in the short term, and typically at low doses. Theres no evidence that benzodiazepines taken long term work for anxiety, she said. […] Benzodiazepine abuse on its own can lead to overdose and death, but overdose deaths typically occur in combination with other substances generally other central nervous system depressants, which, like benzodiazepines, can lead to the life-threatening effect of slowed or stopped breathing. […] In August 2016, the Food and Drug Administration issued a requirement that opioids and benzodiazepines carry a black-box warning about the risks associated with using these substances together.
- #64 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Stimulant abuse — for instance, by taking them in higher doses or by crushing pills and snorting them — can lead to addiction. High doses can raise your body temperature. Misusing stimulants or using them along with decongestants may cause uneven heartbeat. […] Treatment for opioid addiction includes medications that can help people get control without a high chance of addiction. […] Experts believe that medication-assisted treatment with methadone, naltrexone, or suboxone and cognitive behavioral therapy is the best treatment for most patients who have an opioid addiction. […] Prescription drug abuse can have dangerous or deadly effects, especially if you take them along with the drugs listed above: Opioids may cause vomiting, breathing problems, a coma, or death. […] Some experts think that more people are abusing prescription medications because there are more drugs available. Doctors report writing more prescriptions than ever before.
- #65 Oral Manifestations of Commonly Prescribed Drugs | AAFPhttps://www.aafp.org/pubs/afp/issues/2020/1115/p613.html
Drugs are being prescribed with more frequency and in higher quantities. A serious adverse drug event from prescribed medications constitutes 2.4% to 16.2% of all hospital admissions. Many of the adverse drug events present intraorally or periorally in isolation or as a clinical symptom of a systemic effect. Clinical recognition and treatment of adverse drug events are important to increase patient adherence, manage drug therapy, or detect early signs of potentially serious outcomes. Oral manifestations of commonly prescribed medications include gingival enlargement, oral hyperpigmentation, oral hypersensitivity reaction, medication-related osteonecrosis, xerostomia, and other oral or perioral conditions. […] The main categories of oral or perioral manifestations attributable to prescribed medications are gingival enlargement, oral hyperpigmentation, oral hypersensitivity reaction, osteonecrosis, xerostomia, and other oral or perioral conditions such as angioedema and chemical burns.
- #66 Oral Manifestations of Commonly Prescribed Drugs | AAFPhttps://www.aafp.org/pubs/afp/issues/2020/1115/p613.html
Drugs are being prescribed with more frequency and in higher quantities. A serious adverse drug event from prescribed medications constitutes 2.4% to 16.2% of all hospital admissions. Many of the adverse drug events present intraorally or periorally in isolation or as a clinical symptom of a systemic effect. Clinical recognition and treatment of adverse drug events are important to increase patient adherence, manage drug therapy, or detect early signs of potentially serious outcomes. Oral manifestations of commonly prescribed medications include gingival enlargement, oral hyperpigmentation, oral hypersensitivity reaction, medication-related osteonecrosis, xerostomia, and other oral or perioral conditions. […] The main categories of oral or perioral manifestations attributable to prescribed medications are gingival enlargement, oral hyperpigmentation, oral hypersensitivity reaction, osteonecrosis, xerostomia, and other oral or perioral conditions such as angioedema and chemical burns.
- #67 Oral Manifestations of Commonly Prescribed Drugs | AAFPhttps://www.aafp.org/pubs/afp/issues/2020/1115/p613.html
Gingival enlargement (or gingival hyperplasia/hypertrophy or overgrowth) is the enlargement of gum tissue in the mouth. Classic drugs associated with medication-induced gingival enlargement include calcium channel blockers, anticonvulsants, and cyclosporine (Sandimmune). Erythromycin and oral contraceptives have also been implicated in gingival enlargement. The increased overgrowth of gingival tissue is related to the disruption of the degradation of collagen, which leads to a larger amount of extracellular collagen tissue within the gums. […] Medication-related osteonecrosis occurs most commonly in the mandible, yet in rare cases can present extraorally or on the maxilla. The alveolar process (the portion of the jawbone that houses the teeth) is constantly remodeling through resorption (osteoclast activity) and apposition (osteoblast activity). The risk of osteonecrosis is increased in patients receiving drugs that cause osteoclast apoptosis, inhibit osteoclastic activity, or reduce blood flow that supports bone remodeling processes.
- #68 Oral Manifestations of Commonly Prescribed Drugs | AAFPhttps://www.aafp.org/pubs/afp/issues/2020/1115/p613.html
Xerostomia is the perceived sensation of a dry mouth. The parotid, submandibular, and sublingual salivary glands account for most of the salivary production. […] Drug-induced xerostomia occurs most commonly in older people (older than 65 years) and particularly in those patients who are prescribed more than one medication.
- #69 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Stimulant abuse — for instance, by taking them in higher doses or by crushing pills and snorting them — can lead to addiction. High doses can raise your body temperature. Misusing stimulants or using them along with decongestants may cause uneven heartbeat. […] Treatment for opioid addiction includes medications that can help people get control without a high chance of addiction. […] Experts believe that medication-assisted treatment with methadone, naltrexone, or suboxone and cognitive behavioral therapy is the best treatment for most patients who have an opioid addiction. […] Prescription drug abuse can have dangerous or deadly effects, especially if you take them along with the drugs listed above: Opioids may cause vomiting, breathing problems, a coma, or death. […] Some experts think that more people are abusing prescription medications because there are more drugs available. Doctors report writing more prescriptions than ever before.
- #70 Prescription Drug Abuse: Addiction, Types, and Treatmenthttps://www.webmd.com/mental-health/addiction/abuse-of-prescription-drugs
Stimulant abuse — for instance, by taking them in higher doses or by crushing pills and snorting them — can lead to addiction. High doses can raise your body temperature. Misusing stimulants or using them along with decongestants may cause uneven heartbeat. […] Treatment for opioid addiction includes medications that can help people get control without a high chance of addiction. […] Experts believe that medication-assisted treatment with methadone, naltrexone, or suboxone and cognitive behavioral therapy is the best treatment for most patients who have an opioid addiction. […] Prescription drug abuse can have dangerous or deadly effects, especially if you take them along with the drugs listed above: Opioids may cause vomiting, breathing problems, a coma, or death. […] Some experts think that more people are abusing prescription medications because there are more drugs available. Doctors report writing more prescriptions than ever before.
- #71 NIDAâs medication development priorities in response to the Opioid Crisis: ten most wanted | Neuropsychopharmacologyhttps://www.nature.com/articles/s41386-018-0292-5
The mechanisms listed in Table 1 are NIDAs DTMC highest priority pharmacological targets for the development of novel therapeutics to treat opioid overdose and OUD in the near term. […] While the existing medications (e.g., buprenorphine, methadone, naloxone, naltrexone, lofexidine) have demonstrable utility in the treatment of OUD, they are not without limitations. Indeed, problematic residual symptoms and discontinuation rates plague these treatments, leaving a deceptively cavernous un-met medical need that could be addressed, at least in part, by new medications. […] An important component of this list are allosteric modulators. Based on their suppression/augmentation of endogenous responses, negative allosteric modulators (NAMs) and positive allosteric modulators (PAMs) may provide more physiologically relevant effects compared with agonists and antagonists acting on the same receptor, which may ultimately result in improved clinical outcomes.
- #72 NIDAâs medication development priorities in response to the Opioid Crisis: ten most wanted | Neuropsychopharmacologyhttps://www.nature.com/articles/s41386-018-0292-5
The mechanisms listed in Table 1 are NIDAs DTMC highest priority pharmacological targets for the development of novel therapeutics to treat opioid overdose and OUD in the near term. […] While the existing medications (e.g., buprenorphine, methadone, naloxone, naltrexone, lofexidine) have demonstrable utility in the treatment of OUD, they are not without limitations. Indeed, problematic residual symptoms and discontinuation rates plague these treatments, leaving a deceptively cavernous un-met medical need that could be addressed, at least in part, by new medications. […] An important component of this list are allosteric modulators. Based on their suppression/augmentation of endogenous responses, negative allosteric modulators (NAMs) and positive allosteric modulators (PAMs) may provide more physiologically relevant effects compared with agonists and antagonists acting on the same receptor, which may ultimately result in improved clinical outcomes.
- #73 NIDAâs medication development priorities in response to the Opioid Crisis: ten most wanted | Neuropsychopharmacologyhttps://www.nature.com/articles/s41386-018-0292-5
It is important to note that due to the complexity of the addiction cycle, different stages of the disease (e.g., transition from sporadic to chronic use, acute withdrawal, delayed relapse) are likely to have different (albeit overlapping) pathophysiologies. […] Thus, there is unlikely to be a silver bullet among these mechanisms for the treatment of OUD and medications with these mechanisms-of-action are likely to be useful at different stages of the addiction cycle. […] Ultimately, we anticipate multiple medications, integrated with both psychosocial interventions and potentially devices, employed in an orchestrated fashion, will be needed to achieve truly effective treatments tailored for maximal efficacy in different individuals.
- #74 NIDAâs medication development priorities in response to the Opioid Crisis: ten most wanted | Neuropsychopharmacologyhttps://www.nature.com/articles/s41386-018-0292-5
It is important to note that due to the complexity of the addiction cycle, different stages of the disease (e.g., transition from sporadic to chronic use, acute withdrawal, delayed relapse) are likely to have different (albeit overlapping) pathophysiologies. […] Thus, there is unlikely to be a silver bullet among these mechanisms for the treatment of OUD and medications with these mechanisms-of-action are likely to be useful at different stages of the addiction cycle. […] Ultimately, we anticipate multiple medications, integrated with both psychosocial interventions and potentially devices, employed in an orchestrated fashion, will be needed to achieve truly effective treatments tailored for maximal efficacy in different individuals.
- #75 What is the mechanism of action for naltrexone?https://www.drugs.com/medical-answers/mechanism-action-naltrexone-3571077/
Naltrexone is a pure opiate receptor antagonist and works by primarily binding at the mu opioid receptors. By binding to these receptors, it blocks the euphoric (pleasurable or „high”) effects linked with alcohol use or opioids. Naltrexone itself has little or no effect in the absence of alcohol or opiates. […] Naltrexone works in opioid use disorder by producing a complete but reversible block of the effects of the opioid, such as physical dependence, respiratory depression, miosis (pinpoint pupils), analgesia (pain relief), euphoria (pleasurable effects), drug craving and tolerance. […] Naltrexone is thought to work in alcohol use disorder by blocking the effects of endogenous opiates made naturally by the body (like endorphins) which making alcohol ingestion less pleasurable. This action helps to reduce alcohol consumption. […] Naltrexone (and its active metabolite 6-beta-naltrexol) are competitive antagonists to the mu opioid receptors, but also have action at the kappa and delta receptors to a lesser extent. In alcohol use disorder it works by blocking endogenous endorphins at the opioid receptor site.
- #76 What is the mechanism of action for naltrexone?https://www.drugs.com/medical-answers/mechanism-action-naltrexone-3571077/
Naltrexone is a pure opiate receptor antagonist and works by primarily binding at the mu opioid receptors. By binding to these receptors, it blocks the euphoric (pleasurable or „high”) effects linked with alcohol use or opioids. Naltrexone itself has little or no effect in the absence of alcohol or opiates. […] Naltrexone works in opioid use disorder by producing a complete but reversible block of the effects of the opioid, such as physical dependence, respiratory depression, miosis (pinpoint pupils), analgesia (pain relief), euphoria (pleasurable effects), drug craving and tolerance. […] Naltrexone is thought to work in alcohol use disorder by blocking the effects of endogenous opiates made naturally by the body (like endorphins) which making alcohol ingestion less pleasurable. This action helps to reduce alcohol consumption. […] Naltrexone (and its active metabolite 6-beta-naltrexol) are competitive antagonists to the mu opioid receptors, but also have action at the kappa and delta receptors to a lesser extent. In alcohol use disorder it works by blocking endogenous endorphins at the opioid receptor site.
- #77 What is the mechanism of action for naltrexone?https://www.drugs.com/medical-answers/mechanism-action-naltrexone-3571077/
Naltrexone is a pure opiate receptor antagonist and works by primarily binding at the mu opioid receptors. By binding to these receptors, it blocks the euphoric (pleasurable or „high”) effects linked with alcohol use or opioids. Naltrexone itself has little or no effect in the absence of alcohol or opiates. […] Naltrexone works in opioid use disorder by producing a complete but reversible block of the effects of the opioid, such as physical dependence, respiratory depression, miosis (pinpoint pupils), analgesia (pain relief), euphoria (pleasurable effects), drug craving and tolerance. […] Naltrexone is thought to work in alcohol use disorder by blocking the effects of endogenous opiates made naturally by the body (like endorphins) which making alcohol ingestion less pleasurable. This action helps to reduce alcohol consumption. […] Naltrexone (and its active metabolite 6-beta-naltrexol) are competitive antagonists to the mu opioid receptors, but also have action at the kappa and delta receptors to a lesser extent. In alcohol use disorder it works by blocking endogenous endorphins at the opioid receptor site.
- #78 NIDAâs medication development priorities in response to the Opioid Crisis: ten most wanted | Neuropsychopharmacologyhttps://www.nature.com/articles/s41386-018-0292-5
It is important to note that due to the complexity of the addiction cycle, different stages of the disease (e.g., transition from sporadic to chronic use, acute withdrawal, delayed relapse) are likely to have different (albeit overlapping) pathophysiologies. […] Thus, there is unlikely to be a silver bullet among these mechanisms for the treatment of OUD and medications with these mechanisms-of-action are likely to be useful at different stages of the addiction cycle. […] Ultimately, we anticipate multiple medications, integrated with both psychosocial interventions and potentially devices, employed in an orchestrated fashion, will be needed to achieve truly effective treatments tailored for maximal efficacy in different individuals.
- #79 CDC Grand Rounds: Prescription Drug Overdoses — a U.S. Epidemichttps://www.cdc.gov/mmwr/preview/mmwrhtml/mm6101a3.htm
Persons who abuse opioids have learned to exploit this new practitioner sensitivity to patient pain, and clinicians struggle to treat patients without overprescribing these drugs. […] These data suggest that prevention of opioid overdose deaths should focus on strategies that target 1) high-dosage medical users and 2) persons who seek care from multiple doctors, receive high doses, and likely are involved in drug diversion. […] Evidence-based guidelines can educate prescribers regarding the under-appreciated risks and frequently exaggerated benefits of high-dose opioid therapy. Such guidelines especially are needed for emergency departments because persons at greater risk for overdose frequently visit emergency departments seeking drugs. […] A public health approach to the problem of prescription drug overdose also should include secondary and tertiary prevention measures to improve emergency and long-term treatment. Overdose „harm reduction” programs emphasize broader distribution (to nonmedical users) of an opioid antidote, naloxone, that can be used in an emergency by anyone witnessing an overdose.
- #80 Prescription Drug Abuse Recovery | NCTChttps://newchoicestc.com/blog/prescription-drug-abuse/
Mental health conditions often coexist with prescription drug abuse, creating a complex interplay that can complicate treatment and recovery. Conditions like anxiety, depression, and post-traumatic stress disorder (PTSD) can lead people to self-medicate with prescription drugs. […] Effective treatment for prescription drug abuse must address both the substance use and the underlying mental health conditions. Integrated treatment plans that combine medication management with therapy can provide a comprehensive approach to recovery.