Utilization Of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with acetaminophen and codeine phosphate tablets involves careful consideration from the effects about the guardian drug, codeine, and the active metabolite, morphine. Life-Threatening Respiratory Melancholy Advise patients of the chance of daily life-threatening respiratory melancholy, which include inform... https://codeine.store/product/promethazine-side-effects/