What is the recommended dose of MiraLAX (polyethylene glycol) for a 22-pound boy?

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 this child:

1. Convert weight to kilograms:

   • 22 pounds ÷ 2.2 = 10 kilograms

2. Calculate dosage range:

   • Based on research evidence, the recommended dose is 0.5-1 g/kg/day 1
   • For a 10 kg child: 5-10 grams per day

Administration Guidelines

• MiraLAX comes as a powder that should be mixed in 4-8 ounces of liquid (water, juice, or other beverage)
• The powder should be completely dissolved before giving to the child
• The dose can be given once daily, preferably in the morning
• Consistency of stool should determine whether to use the lower or higher end of the dosage range
• Start with the lower dose (5 grams) and adjust as needed based on response

Practical Measurement

• 1 capful of MiraLAX = 17 grams
• For a 5-gram dose: approximately 1/3 capful
• For a 10-gram dose: approximately 2/3 capful
• Using a measuring teaspoon:
  • 1 level teaspoon ≈ 3.5 grams
  • 5 grams ≈ 1.5 teaspoons
  • 10 grams ≈ 3 teaspoons

Monitoring and Adjustments

• Monitor bowel movement frequency and consistency
• If stools become too loose, decrease the dose
• If constipation persists, gradually increase toward the upper end of the range
• Allow 2-4 days for the medication to reach full effect

Important Considerations

• MiraLAX works by drawing water into the colon to soften stool and increase bowel movements
• Ensure adequate fluid intake while using MiraLAX
• The medication is generally well-tolerated with minimal side effects
• Common side effects may include loose stools, gas, or mild abdominal discomfort
• If diarrhea occurs, reduce the dose

Duration of Treatment

• For acute constipation: 3-7 days is typically sufficient
• For chronic constipation: may be used for longer periods under medical supervision
• Consult with a pediatrician for treatment beyond 2 weeks

If constipation persists despite appropriate dosing of MiraLAX, further evaluation by a healthcare provider is recommended to rule out other causes of constipation.