Drug Inverse AgonismReceptor, Cannabinoid, CB1Receptor, Cannabinoid, CB2PiperidinesCarbolinesSerotonin 5-HT2 Receptor AntagonistsSerotonin 5-HT2 Receptor AgonistsHistamine AgonistsPyrazolesDose-Response Relationship, DrugAdrenergic beta-2 Receptor AntagonistsRadioligand AssayGABA-A Receptor AgonistsLigandsGuanosine 5'-O-(3-Thiotriphosphate)Cannabinoid Receptor AgonistsReceptors, Histamine H3CannabinoidsDopamine AgonistsNarcotic AntagonistsHistamine AntagonistsBornanesSerotonin Receptor AgonistsReceptor, Serotonin, 5-HT2CReceptors, CannabinoidGABA AgonistsCHO CellsRats, Sprague-DawleyCannabinoid Receptor AntagonistsDopamine AntagonistsReceptors, Adrenergic, beta-2CyclohexanolsNaphthalenesCricetinaeSerotonin AntagonistsBinding, CompetitiveReceptors, Opioid, deltaReceptors, SerotoninHistamine H3 AntagonistsFlumazenilHistamine H2 AntagonistsHormone AntagonistsReceptors, Opioid, muReceptors, GABA-AGABA AntagonistsCyclic AMPReceptor, Serotonin, 5-HT2AMuscarinic AntagonistsBenzoxazinesDronabinolReceptors, Dopamine D2Receptors, DrugExcitatory Amino Acid AntagonistsAdrenergic alpha-2 Receptor AntagonistsReceptors, G-Protein-CoupledAdrenergic AgonistsAdrenergic alpha-1 Receptor AntagonistsPropanolaminesNaltrexonePyridinesAdrenergic beta-AgonistsNeurokinin-1 Receptor AntagonistsRats, WistarBenzodiazepinesCells, CulturedMethylhistaminesSignal TransductionTetrahydronaphthalenesMorpholinesBenzomorphansCOS CellsIndolesCricetulusAdrenergic AntagonistsAdrenergic alpha-1 Receptor AgonistsCannabinoid Receptor ModulatorsPurinergic P1 Receptor AgonistsCell LineEndocannabinoidsNaloxoneBehavior, AnimalEnkephalin, LeucineReceptor, Serotonin, 5-HT1BPurinergic P1 Receptor AntagonistsInterleukin 1 Receptor Antagonist ProteinBenzylidene CompoundsGABA-A Receptor AntagonistsMuscarinic AgonistsAdrenergic alpha-AntagonistsDrug InteractionsPiperazinesReceptor, Serotonin, 5-HT2BTransfectionGTP-Binding ProteinsNicotinic AgonistsHistamine H1 AntagonistsAdrenergic beta-2 Receptor AgonistsProtein BindingNicotinic AntagonistsReceptors, Serotonin, 5-HT4