Which purgative causes hypokalemia?

Correct option is D

Ans. (d)
Sol. Dulcolex (brand name for bisacodyl) is a stimulant purgative that acts on the colon to increase peristalsis and bowel movements. Frequent or prolonged use can lead to electrolyte imbalances, especially hypokalemia (low potassium), due to excessive fluid and electrolyte loss.
Explanation of each option:
· (a) Osmotic purgative – Increases fluid in the intestines but is less likely to cause significant potassium loss.
· (b) Liquid paraffin – A lubricant laxative, it doesn’t significantly affect potassium levels.
· (c) Castor oil – A stimulant laxative but less commonly associated with severe hypokalemia.
· (d) Dulcolex – Correct answer. Prolonged use may lead to hypokalemia due to electrolyte depletion.