A parent asks how to relieve constipation in a child with cystic fibrosis. What is the nurse's best response?

• A. Your child likely has an obstruction and will require surgery.
• B. Your child will likely be given IV fluids.
• C. Your child will likely be given MiraLAX.
• D. Your child will be placed on a clear liquid diet.

Answer: (C)

In cystic fibrosis, constipation comes from thick, dry stool due to reduced water in the gut and ongoing dehydration. The most effective and appropriate approach is to soften the stool and promote regular bowel movements with an osmotic laxative. MiraLAX (polyethylene glycol 3350) works by drawing water into the colon, which softens the stool and helps it pass more easily. This is a common, safe first-line option for CF-related constipation and fits well with the goal of improving stool consistency without resorting to invasive measures or restrictive diets.

Starting MiraLAX typically involves a pediatric dose with fluids, and providers monitor response and hydration. IV fluids or surgery aren’t the primary relief for routine constipation, and a clear liquid diet doesn’t address stool softness. If constipation persists or is accompanied by pain, vomiting, or signs of obstruction, further evaluation is needed.