Use of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with acetaminophen and codeine phosphate tablets necessitates mindful consideration of the effects within the father or mother drug, codeine, and the Energetic metabolite, morphine. e., numerous copies from the gene for cytochrome P450 isoenzyme 2D6 or higher morphine concentrations). https://directorypile.com/listings13177199/codeine-bnf-max-dose-options