Which classification prevents or relieves diarrhea; inhibits peristalsis and reduces fecal volume (Keopectate, Lomotil, Pepto-Bismol)?

Which classification prevents or relieves diarrhea; inhibits peristalsis and reduces fecal volume (Keopectate, Lomotil, Pepto-Bismol)?

• A. Antibiotic
• B. Antidiarrheal
• C. Antihistamine
• D. Antidepressant

Answer: (B)

Antidiarrheal drugs slow the movement of the gut and/or reduce stool liquidity, which directly prevents or relieves diarrhea. Medications like Lomotil (diphenoxylate with atropine) act by inhibiting intestinal peristalsis and decreasing fluid enteric secretions, while Pepto-Bismol and Kaopectate (bismuth subsalicylate or adsorbent components) help reduce secretions and bind irritants in the gut. This combination of actions is what distinguishes the antidiarrheal class: they directly target the intestinal motility and stool formation to control diarrheal symptoms. Antibiotics treat infections and are not primarily about slowing motility; antihistamines address allergic symptoms, and antidepressants target mood disorders, so they don’t fit this specific therapeutic goal.

Antidiarrheal drugs slow the movement of the gut and/or reduce stool liquidity, which directly prevents or relieves diarrhea. Medications like Lomotil (diphenoxylate with atropine) act by inhibiting intestinal peristalsis and decreasing fluid enteric secretions, while Pepto-Bismol and Kaopectate (bismuth subsalicylate or adsorbent components) help reduce secretions and bind irritants in the gut. This combination of actions is what distinguishes the antidiarrheal class: they directly target the intestinal motility and stool formation to control diarrheal symptoms. Antibiotics treat infections and are not primarily about slowing motility; antihistamines address allergic symptoms, and antidepressants target mood disorders, so they don’t fit this specific therapeutic goal.