Use of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with Promethazine with Codeine Oral Resolution involves thorough thing to consider of the results on the guardian drug, codeine, as well as the active metabolite, morphine.Narcotic analgesics may well induce nausea and vomiting by stimulating the chemoreceptor bring about zone (