Pharmacology · single question
A patient taking antibiotics reports stomach upset/diarrhea. The most likely mechanism is:
Show answer and explanation
Correct answer: A. Disruption of the normal gastrointestinal flora
- A. Correct. Broad-spectrum antibiotics disturb the normal GI microbiota, commonly producing nausea, cramping, and diarrhea (and in severe cases C. difficile colitis).
- B. GI upset is from flora disruption/mucosal irritation, not literal corrosion of the lining.
- C. An IgE allergic reaction would present with hives/anaphylaxis, not simple stomach upset.
- D. Antibiotics do not cause hypoglycemia as the mechanism of GI upset.