Paper I
2024 March (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

Sumatriptan.

Q94 marksShort Answers

Answer

Sumatriptan is a selective 5-HT1B/1D receptor agonist (“triptan”), first-line for acute migraine.

MOA: 5-HT1B/1D receptor agonism causes cranial vasoconstriction and inhibits trigeminal neuropeptide (CGRP, substance P) release, reducing the neurogenic inflammation and vasodilation underlying the migraine attack.

Uses: acute moderate-to-severe migraine attack, cluster headache.

Adverse effects: chest tightness/“triptan sensation,” flushing, paresthesia, coronary vasospasm (contraindicated in ischemic heart disease and uncontrolled hypertension), risk of serotonin syndrome with concurrent SSRIs/MAOIs.

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