NaltrexoneReceptors, Opioid, muDose-Response Relationship, DrugPiperidinesDopamine AntagonistsNeurokinin-1 Receptor AntagonistsExcitatory Amino Acid AntagonistsMuscarinic AntagonistsPurinergic P1 Receptor AntagonistsRats, Sprague-DawleyNarcotic AntagonistsRadioligand AssayAdrenergic alpha-1 Receptor AntagonistsNicotinic AntagonistsHormone AntagonistsAdenosine A2 Receptor AntagonistsPurinergic P2 Receptor AntagonistsBinding, CompetitiveRats, WistarPirenzepineReceptors, SerotoninGABA AntagonistsHistamine H2 AntagonistsAdrenergic alpha-AntagonistsReceptors, EndothelinXanthinesGuinea PigsInterleukin 1 Receptor Antagonist ProteinPurinergic P2X Receptor AntagonistsAdenosine A3 Receptor AntagonistsReceptors, Purinergic P1Histamine AntagonistsBornanesReceptor, Endothelin APyridinesReceptors, TachykininHistamine H1 AntagonistsIndolesAdrenergic beta-AntagonistsPyrazolesPurinergic P1 Receptor AgonistsAdrenergic AntagonistsReceptors, N-Methyl-D-AspartatePropanolaminesDioxanesAdenosineAdrenergic alpha-2 Receptor AntagonistsReceptors, Opioid, deltaMuscle, SmoothReceptors, MuscarinicTachykininsBenzazepinesGABA-A Receptor AntagonistsReceptor, Endothelin BReceptors, Neuropeptide YPeptides, CyclicMuscle ContractionReceptors, Opioid, kappaReceptors, Adrenergic, betaDiaminesReceptor, Cannabinoid, CB2Receptors, Neurokinin-2Receptors, Adrenergic, alpha-1Angiotensin Receptor AntagonistsNeurokinin ABiphenyl CompoundsPrazosinReceptor, Cannabinoid, CB1YohimbinePindololReceptor, Adenosine A2AIodocyanopindololDrug InteractionsReceptors, CannabinoidIsoindolesQuinoxalinesInjections, IntraventricularReceptors, Dopamine D2SulfonamidesReceptors, Neurokinin-1CHO CellsReceptor, Adenosine A3PiperazinesSerotonin Receptor AgonistsSubstance PReceptors, OpioidCapsaicinSerotonin 5-HT3 Receptor AntagonistsPyrrolidinesReceptors, Neurokinin-3Adrenergic alpha-AgonistsSerotonin 5-HT2 Receptor AntagonistsNaphthalenesReceptor, Muscarinic M3Cannabinoid Receptor AntagonistsReceptors, NicotinicCells, CulturedBehavior, AnimalAdenosine-5'-(N-ethylcarboxamide)Serotonin