BuprenorphineOpioid-Related DisordersNarcotic AntagonistsOpiate Substitution TreatmentNarcoticsAnalgesics, OpioidNaloxoneAdministration, SublingualMethadoneMorphinansHeroin DependenceChromatography, AffinityProtein BindingKineticsBinding SitesNeonatal Abstinence SyndromeMolecular Sequence DataBinding, CompetitiveMethadyl AcetateReceptors, OpioidAntibody AffinityAmino Acid SequenceNaltrexoneReceptors, Opioid, muHeroinSubstance Withdrawal SyndromeAffinity LabelsDose-Response Relationship, DrugLigandsRadioligand AssayMorphineOpiate AlkaloidsLevorphanolSubstance Abuse DetectionRecombinant ProteinsThiazinesAnalgesicsModels, MolecularPrescription Drug DiversionBase SequencePrescription Drug MisuseNalbuphineDiprenorphineCell LineStructure-Activity RelationshipSubstance Abuse Treatment CentersDrug InteractionsProtein Structure, TertiaryHydromorphoneProtein ConformationSurface Plasmon ResonanceReceptors, Opioid, kappaStreet DrugsDrug and Narcotic ControlAnalgesia