Biscodyl (Ducolax) is classified as which type of laxative?

• A. Stool softener
• B. Stimulant laxative
• C. Antidiarrheal
• D. Antacid

Answer: (B)

Biscodyl acts by stimulating the nerves in the colon to increase peristaltic activity, which speeds up bowel movements and promotes stool passage. That direct stimulation of colonic contractions is the hallmark of a stimulant laxative.

In contrast, a stool softener works by making stool easier to pass without increasing contractions, an antidiarrheal slows gut movement to reduce frequency, and an antacid neutralizes stomach acid—none of which describe how Biscodyl works.