Receptors, CorticotropinAgouti-Related ProteinReceptors, MelanocortinAgouti Signaling ProteinHormone AntagonistsDopamine AntagonistsExcitatory Amino Acid AntagonistsNeurokinin-1 Receptor AntagonistsNarcotic AntagonistsHistamine H2 AntagonistsInterleukin 1 Receptor Antagonist ProteinMuscarinic AntagonistsDose-Response Relationship, DrugGABA AntagonistsHistamine H1 AntagonistsPurinergic P1 Receptor AntagonistsPiperidinesRats, Sprague-DawleyHistamine AntagonistsNicotinic AntagonistsAdenosine A2 Receptor AntagonistsAdrenergic alpha-1 Receptor AntagonistsPurinergic P2 Receptor AntagonistsSerotonin 5-HT3 Receptor AntagonistsSerotonin 5-HT2 Receptor AntagonistsAdenosine A1 Receptor AntagonistsLeukotriene AntagonistsAngiotensin Receptor AntagonistsRats, WistarAdrenergic alpha-2 Receptor AntagonistsAdrenergic AntagonistsGABA-A Receptor AntagonistsAdrenergic alpha-AntagonistsHistamine H3 AntagonistsRadioligand AssayReceptors, SerotoninReceptors, EndothelinAdrenergic beta-2 Receptor AntagonistsReceptors, N-Methyl-D-AspartateBinding, CompetitiveSerotonin 5-HT1 Receptor AntagonistsCalcium Channel BlockersDizocilpine MaleateGuinea Pigs