Which of the following is NOT considered an H2 blocker?

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Multiple Choice

Which of the following is NOT considered an H2 blocker?

Explanation:
H2 blockers are drugs that reduce stomach acid by blocking histamine at H2 receptors on the gastric parietal cells, which lowers both baseline and meal-stimulated acid secretion. The three drugs listed besides brompheniramine—cimetidine, ranitidine, and famotidine—are classic H2 receptor antagonists used for conditions like GERD, ulcers, and gastritis. Brompheniramine, on the other hand, is an H1 receptor antagonist used to treat allergy symptoms (sneezing, runny nose, itchy eyes). It does not block H2 receptors and thus does not reduce gastric acid production, so it’s not considered an H2 blocker.

H2 blockers are drugs that reduce stomach acid by blocking histamine at H2 receptors on the gastric parietal cells, which lowers both baseline and meal-stimulated acid secretion. The three drugs listed besides brompheniramine—cimetidine, ranitidine, and famotidine—are classic H2 receptor antagonists used for conditions like GERD, ulcers, and gastritis.

Brompheniramine, on the other hand, is an H1 receptor antagonist used to treat allergy symptoms (sneezing, runny nose, itchy eyes). It does not block H2 receptors and thus does not reduce gastric acid production, so it’s not considered an H2 blocker.

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