GERD and Peptic Ulcer Disease USMLE Step 1 Practice Question
A 44-year-old woman with chronic constipation has self-medicated with daily over-the-counter stimulant laxatives for 5 years. She presents with abdominal cramping and loose stools. Vital signs: BP 128/82, HR 88, RR 16, Temp 37°C, SpO2 98%. Colonoscopy reveals dark brown pigmentation throughout the colon without masses or ulcerations. Serum electrolytes are normal. Which agent most likely caused these mucosal findings?
Answer choices
- ABisacodylCorrect answer
- BLactulose
- CPsyllium
- DPolyethylene glycol
- EDocusate
- FSenna
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