NarcoticsNalorphineDrug and Narcotic ControlLevorphanolMeperidineLevallorphanNarcotic AntagonistsPentazocineAnalgesics, OpioidMorphineOpiumAlphaprodineCyclazocineMorphinansLegislation, DrugDextropropoxypheneOpioid-Related DisordersFentanylMethadoneOxymorphoneAnalgesicsCodeineHeroinPain, PostoperativePreanesthetic MedicationHydrocodoneSpasmInert Gas NarcosisSubstance-Related DisordersAlcoholics AnonymousOxycodoneMitragynaIsonipecotic AcidsDibenzocycloheptenesMethotrimeprazineMorphine DependenceHydromorphonePainKetonesParamethasoneBridged CompoundsAnalgesiaPapaverPain, IntractableMethadyl AcetatePharmacyNeonatal Abstinence SyndromeDrug ToleranceAnesthesiaAlfentanilPerphenazineButorphanolSubstance Withdrawal SyndromePain MeasurementMorphine DerivativesInfusion PumpsPhenanthrenesDrug OverdoseNitrous OxidePain ManagementFuransEndorphinsStreet DrugsReceptors, OpioidDoping in SportsGastrointestinal DiseasesAnestheticsNaltrexoneBuprenorphineHeroin DependencePalliative CareAbdominal PainReceptors, Opioid, muMetabolic Detoxication, DrugRetrospective StudiesAnalgesia, Patient-ControlledBupivacaineAnesthetics, LocalLaparoscopyNerve BlockTime FactorsDrug PrescriptionsEnkephalinsHypnotics and SedativesAnalgesics, Non-NarcoticChlorpromazineTreatment OutcomeRespiratory InsufficiencySubstance Abuse DetectionUnited StatesOutpatientsLength of StayChronic DiseaseSyndromeOxidesReceptors, DrugDose-Response Relationship, DrugBrainIrritable Bowel SyndromeAcetaminophen