Appraise sufferers getting acetaminophen and codeine phosphate tablets and any CYP2D6 inhibitor for signals and signs or symptoms which could reflect opioid toxicity and opioid withdrawal when acetaminophen and codeine phosphate tablets are applied along with inhibitors of CYP2D6.If concomitant usage of a CYP3A4 inhibitor is critical or if a CYP3A4