From the Research
The recommended dose of Miralax (polyethylene glycol 3350) for pediatric constipation is typically 0.5-1.5 g/kg/day, with a maximum daily dose of 17 grams, as supported by the most recent and highest quality study 1.
Key Considerations
- For most children, starting with 17 grams (one capful or packet) mixed in 8 ounces of liquid once daily is appropriate for those over 4 years of age, while younger children may start with half this dose (8.5 grams) 2.
- The medication should be dissolved completely in water, juice, or another beverage and can be administered for 2-6 months for chronic constipation.
- Dosing can be adjusted based on response, with the goal of achieving soft, formed bowel movements.
- Miralax works by drawing water into the intestines, softening stool and making it easier to pass, as explained in a study on its effectiveness 3.
Administration and Monitoring
- Parents should monitor for adequate hydration while using Miralax, as it can occasionally cause loose stools if dosed too high.
- If constipation persists despite appropriate dosing for several days, or if there are concerns about abdominal pain, vomiting, or blood in the stool, medical attention should be sought.
- It is essential to follow the recommended dosage and administration guidelines to ensure the safe and effective use of Miralax in pediatric patients, as highlighted in a review of its use in functional constipation and fecal impaction 3.