Celecoxib decreases effects of codeine by influencing hepatic enzyme CYP2D6 metabolism. Use Warning/Keep an eye on. Stops conversion of codeine to its Lively metabolite morphine. cimetidine will boost the stage or result of codeine by impacting hepatic enzyme CYP2D6 metabolism. Use Caution/Keep an eye on. Stops conversion of codeine to https://wockusa.com/product/cablivi/