The article by Knudsen et al1 presents their astute clinical observation of a series of 8 cases of ischemic colitis in patients being treated with sumatriptan succinate. This is a heretofore unreported association and represents a potentially critical side effect involving extracranial vasoconstriction. In speculating about the cause, the authors discuss the possibility of drug-drug interactions, noting that 7 of the 8 patients in their series were taking other concurrent medication(s) in addition to the sumatriptan.
Schwartz CE. A Surfeit of Serotonin: Sumatriptan and Serotonergic Antidepressants. Arch Intern Med. 1999;159(10):1141. doi:https://doi.org/
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