serotonin syndrome (MONDO_0018546, a Monarch Disease Ontology term) can be described as follows. Serotoninergic syndrome is characterized by an excess of serotonin in the central nervous system, associated with the use of various agents, including selective serotonin reuptake inhibitors (SSRIs). Also known as: serotonergic syndrome, serotonin storm, serotonin toxicity, serotonin toxidrome.