A father asks how long lactulose will take to work in the 6-month-old. Which statement is correct?

A father asks how long lactulose will take to work in the 6-month-old. Which statement is correct?

• A. It may take up to 48 hours to act.
• B. It will act within 2 hours.
• C. It should not be used in infants.
• D. It works immediately.

Answer: (A)

Lactulose works by drawing water into the bowel to soften stool, but in infants the response isn’t immediate. It typically takes about one to two days to produce a bowel movement, and in some cases up to 48 hours. That’s why saying it may take up to 48 hours to act is the best statement. Claims that it will work within 2 hours or immediately aren’t consistent with how laxatives work in young children. It isn’t inherently unsafe to use in infants for constipation, and saying it should not be used is incorrect. If no stool appears after about 48 hours at a given dose, you’d reassess with a clinician.

Lactulose works by drawing water into the bowel to soften stool, but in infants the response isn’t immediate. It typically takes about one to two days to produce a bowel movement, and in some cases up to 48 hours. That’s why saying it may take up to 48 hours to act is the best statement. Claims that it will work within 2 hours or immediately aren’t consistent with how laxatives work in young children. It isn’t inherently unsafe to use in infants for constipation, and saying it should not be used is incorrect. If no stool appears after about 48 hours at a given dose, you’d reassess with a clinician.