Meclizine is classified as which type of medication?

• A. Antiemetic
• B. Antacid
• C. H2-receptor blockers
• D. Proton Pump Inhibitors

Answer: (A)

Meclizine is classified as an antiemetic because its primary role is to prevent nausea and vomiting, especially from motion sickness or vertigo. It works as an H1 histamine receptor antagonist in the vestibular system and the brain’s vomiting center, dampening the signals that trigger nausea. This mechanism is different from antacids, which neutralize stomach acid, H2-receptor blockers, which reduce acid production by blocking H2 receptors on gastric parietal cells, and proton pump inhibitors, which block the proton pumps that secrete acid. So, meclizine’s purpose is antiemetic relief, not acid suppression or stomach acid neutralization.