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Documents about Morphine, Codeine, Buprenorphine, Fentanyl, Heroin, Hydrocodone, Methadone, Oxycodone, Tramadol and other opiates and opioids.
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  Pharmacokinetic drug interactions of morphine, codeine, and their derivatives: theory and clinical reality, part I (2003) Left click: open entry/Right click: save entry
Psychosomatics. 2003 Mar-Apr;44(2):167-71

Armstrong SC, Cozza KL

Pharmacokinetic drug-drug interactions with morphine, hydromorphone, and oxymorphone are reviewed in this column. Morphine is a naturally occurring opiate that is metabolized chiefly through glucuronidation by uridine diphosphate glucuronosyl transferase (UGT) enzymes in the liver. These enzymes produce an active analgesic metabolite and a potentially toxic metabolite. In vivo drug-drug interaction studies with morphine are few, but they do suggest that inhibition or induction of UGT enzymes could alter morphine and its metabolite levels. These interactions could change analgesic efficacy. Hydromorphone and oxymorphone, close synthetic derivatives of morphine, are also metabolized primarily by UGT enzymes. Hydromorphone may have a toxic metabolite similar to morphine. In vivo drug-drug interaction studies with hydromorphone and oxymorphone have not been done, so it is difficult to make conclusions with these drugs

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Keywords: codeine interactions morphine pharmacokinetics
 

 
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