To the Editor: Triptans are serotonin-receptor agonists usedin the treatment of migraine headaches. When administered incombination with certain drugs, such as selective serotonin-reuptakeinhibitors (SSRIs) and serotonin–norepinephrine reuptakeinhibitors (SNRIs), triptans may precipitate the serotonin syndrome,a potentially life-threatening condition characterized by atriad of clinical manifestations — changes in mental status,autonomic hyperactivity, and neuromuscular abnormalities.1,2The cause of the serotonin syndrome is related to altered serotoninsynthesis, release, reuptake, metabolism, or receptor agonism.3We investigated whether triptan monotherapy is associated withthe serotonin syndrome by searching for such cases in the Foodand Drug Administration's Adverse . . . [Full Text of this Article]