Which rectal injection is used to evacuate the bowels?

• A. Mouthwash
• B. Enema
• C. Suppository
• D. Capsule

Answer: (B)

Enemas deliver a liquid directly into the rectum to hydrate, soften stool, and stimulate bowel movement for rapid evacuation. The liquid creates distension and osmotic effects in the lower bowel, triggering peristalsis and helping stool pass quickly. This approach is specifically used when a quick cleansing of the bowel is needed, such as before medical procedures or for constipation relief.

Mouthwash is used for the mouth, not the rectum. A suppository is inserted into the rectum as a solid form that melts to act locally or systemically, but it is not a liquid injection and typically works more slowly. A capsule is swallowed, so it does not reach the rectum to evacuate the bowels.