Usage of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with Promethazine with Codeine Oral Answer involves careful thing to consider of the consequences to the mum or dad drug, codeine, plus the Lively metabolite, morphine.Unresponsive Cough The dosage of Promethazine with Codeine Oral Alternative should not be enhanced if cough f