AcetaminophenNarcoticsAnalgesics, Non-NarcoticNalorphineDrug and Narcotic ControlDrug-Induced Liver InjuryLevorphanolDrug OverdoseMeperidineIminesAnalgesics, OpioidLevallorphanAntipyreticsNarcotic AntagonistsPentazocineMorphineHydrocodoneAnalgesicsIbuprofenOpiumAlphaprodinePain, PostoperativeCodeineAnti-Inflammatory Agents, Non-SteroidalCyclazocineMorphinansLegislation, DrugLiver Failure, AcuteDextropropoxypheneFentanylOpioid-Related DisordersAdministration, RectalMethadoneAntidotesOxymorphonePainGlutathionePain MeasurementLiverHeroinCytochrome P-450 CYP2E1PhenacetinAlanine TransaminasePreanesthetic MedicationAcetylcysteineAnalgesiaHydromorphoneDose-Response Relationship, DrugAminophenolsSpasmInert Gas NarcosisSubstance-Related DisordersFeverBenzoquinonesDouble-Blind MethodAlcoholics AnonymousOxycodoneMetabolic Detoxication, DrugMitragynaAnalgesia, Patient-ControlledNonprescription DrugsDrug LabelingNecrosisGastrointestinal DiseasesIsonipecotic AcidsTime FactorsHepatocytesDibenzocycloheptenesDrug InteractionsMethotrimeprazineMorphine DependenceKetonesParamethasoneBridged CompoundsPapaverPain, IntractablePain ManagementMethadyl AcetatePharmacyGlucuronatesAspartate AminotransferasesNeonatal Abstinence SyndromeDrug ToleranceGlutathione DisulfideAspirinAnesthesia