Bromfed Dosing for 13.61 kg Child
For a child weighing 13.61 kg, give 2.5 mL (½ teaspoonful) of Bromfed every 4 hours, not exceeding 6 doses in 24 hours 1.
Dosing Rationale
A 13.61 kg child typically falls into the 2 to under 6 years age range based on standard pediatric growth parameters. The FDA-approved Bromfed labeling provides clear age-based dosing that corresponds to typical weight ranges 1:
- Children 2 to under 6 years: 2.5 mL (½ teaspoonful) every 4 hours
- Children 6 to under 12 years: 5 mL every 4 hours
- Maximum: 6 doses per 24-hour period
Key Clinical Considerations
Weight-Based Dosing Context
While the FDA label uses age-based dosing, research demonstrates that age/weight-based nomograms for brompheniramine achieve similar plasma concentrations (Cmax and AUC) across pediatric age groups when using a 4-fold dose range 2. The pharmacokinetics show:
- Similar Cmax across age groups
- Clearance and volume of distribution increase proportionally with age (when allometrically scaled)
- Half-life remains consistent at approximately 15 hours regardless of age 2
Important Safety Points
Monitor for sedation, which is the most common adverse effect and appears more prevalent in the 2-5 year age group 2. Be prepared to:
- Observe the child for excessive drowsiness or CNS depression
- Avoid combining with other sedating medications
- Ensure caregivers understand not to exceed the maximum daily dose
Pitfalls to Avoid
- Do not use weight-based mg/kg dosing for Bromfed in routine practice—the FDA label provides age-based dosing that has been validated for safety and efficacy
- Never exceed 6 doses in 24 hours regardless of symptom severity
- Do not round up to the higher dose (5 mL) unless the child is actually 6 years or older, as this doubles the brompheniramine exposure
Overdose Recognition
Be aware that toxic effects can occur at surprisingly low doses in young children. Signs include CNS effects (depression or stimulation), anticholinergic symptoms, and with the pseudoephedrine component, potential tachycardia and hypertension 1.