Simethicone Dosage for Infants
For infants with colic or gas symptoms, administer simethicone 0.3 mL (20 mg) per feeding, not to exceed 12 doses (240 mg) in 24 hours.
Dosing Recommendations
Standard Infant Dosing
- Dose per feeding: 0.3 mL (20 mg) of simethicone drops
- Maximum daily dose: 240 mg (12 doses) in 24 hours
- Administration: Give with or after each feeding as needed
This dosing regimen is based on the formulation commonly used in clinical practice (20 mg/0.3 mL concentration) 1.
Evidence Quality and Efficacy Considerations
Important Caveat About Effectiveness
While simethicone is widely used and generally considered safe, the evidence for its efficacy in treating infant colic is contradictory and limited:
- An open-label trial showed 78% improvement after one day and 86% after seven days using 0.3 mL per feeding 1
- However, a higher-quality randomized, double-blind, placebo-controlled multicenter trial found no difference between simethicone and placebo in treating infantile colic, with simethicone showing the same response rate as placebo 2
When to Avoid Simethicone
Do not use simethicone concurrently with oral lactase treatment in infants with lactose intolerance, as recent evidence suggests a potential drug interaction that reduces lactase efficacy 3. This is a critical clinical pitfall to avoid.
Adult Dosing (For Reference)
For adults, the FDA-approved dosing is 1-2 softgels (180 mg each) as needed after meals and at bedtime, not exceeding 2 softgels (360 mg) in 24 hours 4.
Clinical Bottom Line
Given the lack of proven efficacy over placebo for infant colic 2, simethicone should be used with realistic expectations. It may be tried as a low-risk intervention, but parents should be counseled that it may not provide benefit beyond placebo effect. The standard dose remains 0.3 mL per feeding with a maximum of 240 mg daily, and it should be avoided in infants receiving lactase supplementation.