GuanfacineWakefulness-Promoting AgentsReceptors, Adrenergic, alpha-2PhenylacetatesAdrenergic alpha-2 Receptor AgonistsGuanidinesAdrenergic alpha-AgonistsClonidineIdazoxanPurinergic P1 Receptor AgonistsReceptors, Adrenergic, alphaSerotonin Receptor AgonistsDopamine AgonistsDose-Response Relationship, DrugSerotonin 5-HT1 Receptor AgonistsSerotonin 5-HT2 Receptor AgonistsAntihypertensive AgentsTriamtereneAdenosine A1 Receptor AgonistsAdrenergic alpha-Antagonists