Which of the following is not an ergot alkaloid_____________?
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Answer: C. Ketanserin
Explanation
Ketanserin is chemically classified as a quinazoline derivative rather than a natural or semisynthetic ergot compound. Ergot alkaloids share a characteristic tetracyclic ergoline ring system derived from fungal metabolites of Claviceps purpurea. Pharmacological profiling confirms that ketanserin operates primarily as a selective antagonist at serotonin receptors. Ergot alkaloids encompass a diverse group of compounds produced by fungi that parasitize various cereal grains. These substances exhibit complex interactions with adrenergic dopaminergic and serotonergic receptors throughout the body. Medical applications include treating acute migraine headaches and managing postpartum hemorrhage through smooth muscle contraction.
Ketanserin is utilized clinically as an antihypertensive agent due to its peripheral vascular receptor blocking properties. Differentiating drug classes helps pharmacologists predict side effect profiles and potential adverse clinical drug interactions. Researchers study these receptor interactions to develop safer and more specific cardiovascular medications. Bromocriptine is a well known ergot derivative used as a dopamine agonist in Parkinson disease treatment. Lysergic acid diethylamide is a powerful synthetic hallucinogen built upon a classic ergot alkaloid chemical scaffold. Methysergide is a semisynthetic ergot derivative historically prescribed for the prophylactic management of severe vascular headaches.
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