Wakefulness-Promoting AgentsReceptors, Adrenergic, alpha-2CatecholaminesPurinergic P1 Receptor AgonistsEpinephrineNorepinephrineSerotonin Receptor AgonistsDopamine AgonistsSerotonin 5-HT1 Receptor AgonistsSerotonin 5-HT2 Receptor AgonistsAdenosine A1 Receptor AgonistsAdrenal MedullaDose-Response Relationship, DrugReceptors, CatecholamineGABA AgonistsReceptors, Adrenergic, alphaGABA-A Receptor AgonistsRats, Sprague-DawleyAdenosine A2 Receptor AgonistsAdrenergic alpha-2 Receptor AgonistsGABA-B Receptor AgonistsCannabinoid Receptor AgonistsAdrenergic alpha-AgonistsSerotonin 5-HT4 Receptor AgonistsDopaminePurinergic P2 Receptor AgonistsIsoproterenolalpha 1-AntitrypsinChromaffin CellsAdrenergic AgonistsPhenethylaminesNicotinic AgonistsReceptors, Opioid, kappaAdenosineAdrenergic beta-AgonistsAdenosine A3 Receptor AgonistsMuscarinic AgonistsHistamine AgonistsDopamine beta-HydroxylaseAdrenal GlandsRats, WistarAdrenergic alpha-AntagonistsChromaffin SystemSerotonin AntagonistsReceptors, AdrenergicReceptors, Opioid, muPropranololCalciumPheochromocytomaTyrosine 3-MonooxygenaseCells, CulturedCyclic AMPReceptors, Dopamine D2ReserpineNormetanephrineReceptors, Adrenergic, betaClonidine2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineAdrenergic beta-3 Receptor AgonistsReceptors, Adrenergic, alpha-1Radioligand AssaySerotoninSignal TransductionBaclofenVanilmandelic AcidHypoxia-Inducible Factor 1, alpha SubunitTime FactorsReceptors, Dopamine D1Receptors, Opioid, deltaQuinpiroleReceptors, Purinergic P1Receptors, NicotinicPiperidinesBenzazepinesExcitatory Amino Acid AgonistsKineticsChromaffin GranulesEnkephalin, Ala(2)-MePhe(4)-Gly(5)-8-Hydroxy-2-(di-n-propylamino)tetralinNeuronsAdrenergic alpha-1 Receptor AgonistsGuinea PigsDrug InteractionsCattleMice, Inbred C57BLReceptors, OpioidReceptor, Adenosine A2APhenylephrineAdrenal Gland NeoplasmsReceptors, SerotoninAcetylcholineCannabinoidsalpha7 Nicotinic Acetylcholine ReceptorPyrrolidinesLigandsCholinergic AgonistsYohimbineMuscimolMetanephrinePrazosin