Drug AntagonismDose-Response Relationship, DrugEdrophoniumAntibiosisPiperidinesReceptor, Endothelin ADrug InteractionsSerotonin AntagonistsMineralocorticoid Receptor AntagonistsRats, Sprague-DawleyNeostigmineReceptors, EndothelinSpironolactonePeptides, CyclicGuinea PigsAdrenergic alpha-AntagonistsAdrenergic alpha-1 Receptor AntagonistsDrug SynergismDopamine AntagonistsBinding, CompetitiveNaltrexoneBenzazepinesExcitatory Amino Acid AntagonistsNarcotic AntagonistsTretoquinolPyrrolidinesReceptor, Endothelin BRats, WistarEndothelin-1Signal TransductionMuscle ContractionPrazosinSulfonamidesDibenzylchlorethamineXanthinesReceptors, MineralocorticoidParasympatholyticsReceptors, SerotoninReceptors, N-Methyl-D-AspartatePyrazolesReceptors, ThromboxaneMice, Inbred C57BLNorepinephrineTime FactorsNaloxoneLosartanReceptor, Cannabinoid, CB1Blood PressureAdenosine A2 Receptor AntagonistsRadioligand AssayPropranololMuscle, SmoothAdrenergic beta-AntagonistsPyridinesHuman Immunodeficiency Virus ProteinsBiphenyl CompoundsMuscarinic AntagonistsImidazolesDizocilpine MaleateDisease Models, AnimalRitanserinCells, CulturedNeuromuscular Nondepolarizing AgentsPurinergic P1 Receptor AntagonistsCell LinePurinergic P2 Receptor AntagonistsLigandsSerotoninSerotonin 5-HT2 Receptor AntagonistsViral Regulatory and Accessory ProteinsHaloperidolAngiotensin Receptor AntagonistsAtracuriumPentanoic AcidsBehavior, AnimalAdenosine A1 Receptor AntagonistsReceptors, Dopamine D2AdenosineQuinolinesPiperazinesPyridostigmine BromideTracheaTetrazolesNeurokinin-1 Receptor AntagonistsPhenoxybenzamineReceptors, ProstaglandinLysergic Acid DiethylamideTriazolesMorphineIsoproterenolVasoconstrictionLevorphanolQuinoxalinesAcetylcholineTheophyllinePancuroniumGABA-A Receptor AntagonistsStructure-Activity RelationshipAntihypertensive AgentsReceptors, Opioid