MiraLAX Dosing for a 22-Pound Child
The recommended dose of MiraLAX (polyethylene glycol 3350) for a 22-pound child is 0.5-1 gram per kilogram per day, which equals approximately 5-10 grams daily.
Dosage Calculation
To determine the appropriate dose for a 22-pound child:
- Convert pounds to kilograms: 22 pounds = 10 kilograms
- Apply the standard pediatric dosing range of 0.5-1 g/kg/day
- Resulting dose: 5-10 grams of MiraLAX daily
Administration Guidelines
- Mix the powder completely in 4-8 ounces of water or other beverage
- Can be administered once daily or divided into two doses
- Best given in the morning for predictable results
- Effects typically begin within 24-48 hours
Evidence-Based Support
Research shows that polyethylene glycol 3350 is safe and effective for treating constipation in children:
- A study examining PEG 3350 in children with dysfunctional elimination found an average effective dose of 0.63 g/kg 1
- Clinical trials have demonstrated that PEG is well-tolerated with minimal side effects in pediatric populations 2, 3
Monitoring and Safety Considerations
- Monitor for adequate hydration while using MiraLAX
- Common side effects may include loose stools, gas, or abdominal bloating
- If diarrhea occurs, reduce the dose
- Discontinue use and consult a healthcare provider if:
- Symptoms persist beyond 7 days
- Severe abdominal pain develops
- Blood appears in the stool
Special Considerations
- For chronic constipation, the dose may need adjustment based on response
- MiraLAX works by drawing water into the colon to soften stool and increase bowel movements
- Unlike stimulant laxatives, it does not cause dependency
For optimal results, ensure the child maintains adequate fluid intake while using MiraLAX, as proper hydration enhances its effectiveness.