NarcoticsNalorphineDrug and Narcotic ControlLevorphanolMeperidineLevallorphanNarcotic AntagonistsPentazocineAnalgesics, OpioidMorphineOpiumAlphaprodineCyclazocineMorphinansLegislation, DrugDextropropoxypheneOpioid-Related DisordersFentanylMethadoneOxymorphoneAnalgesicsCodeineHeroinPain, PostoperativePreanesthetic MedicationSpasmHydrocodoneSubstance-Related DisordersInert Gas NarcosisAlcoholics AnonymousOxycodonePainMitragynaKetonesIsonipecotic AcidsMorphine DependenceHydromorphoneDibenzocycloheptenesMethotrimeprazineBridged CompoundsAnalgesiaParamethasonePain, IntractablePapaverAnesthesiaMethadyl AcetateDrug TolerancePharmacyNeonatal Abstinence SyndromeAlfentanilPain MeasurementTime FactorsPerphenazineSubstance Withdrawal SyndromeButorphanolDrug OverdosePhenanthrenesInfusion PumpsFuransMorphine DerivativesPain ManagementGastrointestinal DiseasesRetrospective StudiesNitrous OxideEndorphinsStreet DrugsReceptors, OpioidDoping in SportsAnestheticsTreatment OutcomeAbdominal PainNaltrexoneBuprenorphinePalliative CareHeroin DependenceMetabolic Detoxication, DrugBrainReceptors, Opioid, muDose-Response Relationship, DrugUnited StatesBupivacaineLaparoscopyAnesthetics, LocalAnalgesia, Patient-ControlledProspective StudiesChronic DiseaseFollow-Up StudiesNerve BlockSyndromeDrug PrescriptionsHypnotics and SedativesAnalgesics, Non-NarcoticSubstance Abuse DetectionChlorpromazineEnkephalinsRespiratory InsufficiencyRisk FactorsLength of StayOxidesOutpatients