Abstract
Serotonin syndrome presents with neuromuscular, autonomic, and mental status changes. Severe cases of serotonin syndrome, also called serotonin toxicity, are characterized by neuromuscular excitation (clonus, hyperreflexia, myoclonus, rigidity, tremor), autonomic stimulation (hyperthermia, tachycardia, tachypnea, diaphoresis, flushing), and altered mental state (anxiety, agitation, confusion). These more severe cases may come to the clinician’s attention on an emergency basis. The diagnosis of serotonin syndrome should be considered in a patient presenting with any combination of clonus, myoclonus, rigidity, and/or tremor. Serotonin syndrome is associated with the use of one or more serotonergic agents. Severe cases generally occur with combinations of serotonergic drugs, most commonly including a serotonin reuptake inhibitor and a monoamine oxidase inhibitor. Excessive serotonin (5-hydroxytryptamine) in the central nervous system has been implicated. Certain patient populations may be predisposed to developing serotonin toxicity, based on their use of various medications or other substances with serotonergic properties. When evaluating a patient with clinical features of neuromuscular excitation, autonomic stimulation, and/or altered mental state, prompt identification and management are critical, and treatment considerations are often complex.
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Gordon, M.F., Leder, A.N. (2013). Serotonin Syndrome. In: Frucht, S. (eds) Movement Disorder Emergencies. Current Clinical Neurology. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-60761-835-5_18
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