serotonergic agonist serotonin agonist chebi_ontology CHEBI:35941 serotonergic agonists serotonin agonists 5-HT agonist 5-hydroxytryptamine agonist An agent that has an affinity for serotonin receptors and is able to mimic the effects of serotonin by stimulating the physiologic activity at the cell receptors. Serotonin agonists are used as antidepressants, anxiolytics, and in the treatment of migraine disorders. serotonergic drug