HydrocodoneAcetaminophenHydromorphoneOxycodoneCodeineAnalgesics, Non-NarcoticOxymorphoneObstetric Surgical ProceduresAnalgesics, OpioidSubstance Abuse DetectionMorphine DerivativesAntitussive AgentsNarcoticsMiosisCytochrome P-450 CYP2D6Gas Chromatography-Mass SpectrometryDrug-Induced Liver InjuryOpioid-Related DisordersMorphine