NarcoticsAnalgesicsMorphinansAnalgesics, OpioidCannabinoid Receptor AgonistsDose-Response Relationship, DrugDrug Partial AgonismNalorphineEstrogen AntagonistsLigandsReceptors, Opioid, muSelective Estrogen Receptor ModulatorsNarcotic AntagonistsPiperidinesReceptors, Opioid, deltaAnalgesics, Non-NarcoticDrug and Narcotic ControlMorphineRaloxifeneCannabinoidsReceptor, Cannabinoid, CB1LevorphanolRats, Sprague-DawleyReceptor, Adenosine A1MeperidineBinding, CompetitivePentazocineAnalgesiaPainDopamine AgonistsPain MeasurementStructure-Activity RelationshipLevallorphanEstrogen Receptor betaTamoxifenPain, PostoperativeNicotinic AgonistsDextropropoxypheneReceptors, OpioidEstrogen Receptor alphaReceptors, EstrogenSignal TransductionBinding SitesCyclazocineRadioligand AssayFentanylProtein BindingAmino Acid SequenceMolecular Sequence DataCell LineCells, CulturedXamoterolModels, MolecularDopamine AntagonistsGABA AgonistsCodeineHormone AntagonistsEstradiolOpiumOpioid-Related DisordersGABA-A Receptor AgonistsNaltrexoneBenzazepinesSerotonin Receptor AgonistsDrug ToleranceAlphaprodineAdrenergic beta-AgonistsExcitatory Amino Acid AntagonistsAzocinesOxymorphoneDrug InteractionsSerotonin 5-HT1 Receptor AgonistsBuprenorphineQuinoxalinesRats, WistarLegislation, DrugMuscarinic AgonistsPropanolaminesPurinergic P1 Receptor AgonistsMethadoneNaloxoneCycloserineReceptors, Dopamine D2AnabasineQuinolizinesHistamine AgonistsAdrenergic beta-1 Receptor AgonistsTramadolPindololAdrenergic alpha-AgonistsReceptors, Dopamine D3Neurokinin-1 Receptor AntagonistsReceptors, Opioid, kappaNicotinic AntagonistsOxycodoneButorphanolCHO CellsMuscarinic AntagonistsTime FactorsReceptors, Serotonin