Radioligand AssayPurinergic P1 Receptor AntagonistsReceptors, Purinergic P1Binding, CompetitiveXanthinesTriazolesTritiumDopamine AntagonistsHormone AntagonistsNeurokinin-1 Receptor AntagonistsMuscarinic AntagonistsDose-Response Relationship, DrugNarcotic AntagonistsPiperidinesExcitatory Amino Acid AntagonistsRats, Sprague-DawleyAdrenergic alpha-1 Receptor AntagonistsHistamine H2 AntagonistsInterleukin 1 Receptor Antagonist ProteinHistamine AntagonistsReceptors, SerotoninHistamine H1 AntagonistsAdrenergic alpha-AntagonistsGABA AntagonistsLigandsReceptors, Dopamine D2Nicotinic AntagonistsIodine RadioisotopesSerotonin 5-HT3 Receptor AntagonistsReceptors, Adrenergic, betaPyridinesBrainPositron-Emission TomographyRats, WistarAdenosine A1 Receptor AntagonistsPindololAdenosine A2 Receptor AntagonistsPurinergic P2 Receptor AntagonistsCHO CellsIodocyanopindololRadiopharmaceuticalsPropanolaminesGuinea PigsHistamine H3 AntagonistsReceptors, Adrenergic, alpha-1Serotonin 5-HT2 Receptor AntagonistsAngiotensin Receptor AntagonistsCricetinaeAdrenergic alpha-2 Receptor AntagonistsN-MethylscopolamineFluorine RadioisotopesAutoradiographyQuinuclidinyl BenzilateReceptors, Histamine H3Bicyclo Compounds, HeterocyclicSerotonin Receptor AgonistsPiperazinesKineticsBenzazepinesReceptors, EndothelinDioxanesPyrrolidinesPrazosinReceptors, MuscarinicNortropanesSerotonin 5-HT1 Receptor AntagonistsLeukotriene AntagonistsCarbon RadioisotopesSpiperoneRadiochemistryAdrenergic beta-AntagonistsReceptors, Dopamine D3KetanserinReceptors, CholecystokininDihydroalprenololReceptors, PurinergicCalcium Channel BlockersBinding SitesCells, CulturedAdenosineAdrenergic AntagonistsGABA-A Receptor AntagonistsIndolesBiphenyl CompoundsPyrazolesSulfonamidesPeptides, CyclicAzepinesReceptors, N-Methyl-D-AspartateReceptors, Adrenergic, alphaReceptors, OpioidCyclic AMPDopamine AgonistsSerotoninReceptor, Cannabinoid, CB1NaltrexoneDrug InteractionsBenzodiazepinonesReceptor, Serotonin, 5-HT2ATissue Distribution