Miralax (Polyethylene Glycol) Dosing for a 12-Month-Old Child
For a 12-month-old child with constipation, Miralax (polyethylene glycol) is not FDA-approved, and you should consult with a pediatrician before use, as the FDA label states "children 16 years of age or under: ask a doctor." 1
Recommended Dosing When Prescribed by a Physician
When a physician determines Miralax is appropriate for a 12-month-old:
- The typical starting dose is approximately 0.5-1 g/kg/day 2
- For a 12-month-old (typically weighing 8-10 kg), this translates to roughly 4-10 g of Miralax powder daily 2
- Mix the prescribed amount in 2-4 ounces of liquid (water, juice, or milk) 3
- Ensure the powder is completely dissolved before giving to the child 1
Administration Tips
- Give the dose once daily at the same time each day 3
- Do not combine with starch-based thickeners used for difficult swallowing 1
- Ensure the powder is fully dissolved before giving to the child 1
- Do not give if there are any clumps in the solution 1
Duration of Treatment
- Do not use for more than 7 days without physician supervision 1
- Treatment of functional constipation typically requires sufficient dosing for an adequate period 4
- Follow-up with the prescribing physician is essential to monitor effectiveness and adjust dosing as needed 4
Safety Considerations
- Polyethylene glycol is generally well-tolerated in pediatric patients 2, 3
- The most common side effect is diarrhea if the dose is too high 2
- Monitor for proper hydration during treatment 4
- If symptoms worsen or do not improve within 48-72 hours, contact your physician 4
Important Cautions
- The FDA label specifically states to consult a doctor for children 16 years and under 1
- Polyethylene glycol is more commonly used in children over 6 months of age, though dosing should be determined by a healthcare provider 4
- For infants under 6 months with constipation, lactulose-based medications are typically the first-line treatment 4
Always follow the specific instructions provided by your child's healthcare provider, as they will tailor the dose to your child's specific needs and medical condition.