HydrocodoneHydromorphoneOxycodoneCodeinePigmentation DisordersOxymorphoneObstetric Surgical ProceduresBody WaterPulmonary Valve StenosisSubstance Abuse DetectionAnalgesics, OpioidUreaMorphine DerivativesAntitussive AgentsNarcoticsMiosisCytochrome P-450 CYP2D6Gas Chromatography-Mass SpectrometryAcetaminophenOpioid-Related DisordersDNA