The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are advanced, necessitating watchful consideration of the results within the father or mother drug, codeine, and also the Lively metabolite, morphine.The phenylephrine contained in Promethazine VC with Codeine Oral Alter