Albendazole exerts its antiparasitic effect primarily by:

A Inhibiting microtubule polymerization

B Blocking acetylcholine receptors

C Inhibiting DNA gyrase

D Interfering with folate metabolism

Solution

Correct Answer: Option A

- Albendazole works by binding to parasite β-tubulin, which inhibits microtubule polymerization.
- This disruption impairs essential cellular processes like glucose uptake and intracellular transport, leading to energy depletion and parasite death.
- Unlike options involving neurotransmitter or DNA synthesis interference, albendazole specifically targets the cytoskeletal structure unique to parasites, making microtubule inhibition the primary antiparasitic mechanism.

Reference: Katzung BG, Basic and Clinical Pharmacology, 15th Edition, Chapter 48/ Page 670

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