[Serotonin syndrome shortly after the administration of low-dose mirtazapine]

Serotonin syndrome is a rare neuropsychiatric complication caused by serotonergic drugs. Symptoms include confusion, psychosis, tremor, palpitations, hyperthermia, and the neurological examination shows signs of central nervous system deficits. This is a case report of a 67-year-old woman, who developed serotonin syndrome in the form of delusions, tremor, cerebellar ataxia and upper neuron signs one day after administration of low-dose mirtazapine therapy. Complete symptom remission occurred one week after the discontinuation of mirtazapine.