Question:

\(\mathrm{H_1}\)-Receptor antagonists is a term associated with :

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H1 receptors are the histamine receptors involved in allergic responses.
Updated On: Oct 31, 2026
  • Antiseptics
  • Antihistamins
  • Antacids
  • Analgesics
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The Correct Option is B

Solution and Explanation

Histamine acts on \(\mathrm{H_1}\) receptors to cause allergic effects (itching, sneezing, bronchial contraction). Drugs that block these receptors, such as brompheniramine (Dimetapp) and terfenadine (Seldane), are called antihistamines.
Antacids (e.g. ranitidine, cimetidine) act on \(\mathrm{H_2}\) receptors to reduce gastric acid; antiseptics kill microbes on living tissue; analgesics relieve pain.
Answer: (2) Antihistamins
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