Which class is a nonspecific serotonin receptor agonist and vasoconstrictor?

Which class is a nonspecific serotonin receptor agonist and vasoconstrictor?

• A. Ergotamines
• B. Calcitonin gene-related peptide antagonists
• C. Triptans
• D. NSAIDs

Answer: (A)

Ergotamines fit because they act on multiple serotonin receptors, not just one subtype. This broad, nonspecific serotonergic activity causes strong vasoconstriction of cerebral vessels, which helps counter migraine-related vasodilation. In addition to their serotonergic effects, they can interact with other receptor systems, contributing to their powerful but broad action. In contrast, the other options don’t match this profile: calcitonin gene-related peptide antagonists target CGRP signaling, not serotonin receptors; triptans are selective 5-HT1B/1D agonists with a focused receptor target; NSAIDs work by inhibiting prostaglandin synthesis rather than modulating serotonin receptors.

Ergotamines fit because they act on multiple serotonin receptors, not just one subtype. This broad, nonspecific serotonergic activity causes strong vasoconstriction of cerebral vessels, which helps counter migraine-related vasodilation. In addition to their serotonergic effects, they can interact with other receptor systems, contributing to their powerful but broad action.

In contrast, the other options don’t match this profile: calcitonin gene-related peptide antagonists target CGRP signaling, not serotonin receptors; triptans are selective 5-HT1B/1D agonists with a focused receptor target; NSAIDs work by inhibiting prostaglandin synthesis rather than modulating serotonin receptors.