Bromfed Dosing for 32.26 kg Child
For a child weighing 32.26 kg, administer 5 mL (1 teaspoonful) of Bromfed DM Cough Syrup every 4-6 hours, not to exceed 4 doses in 24 hours.
Dosing Rationale
The FDA-approved formulation contains per 5 mL: brompheniramine maleate 2 mg, pseudoephedrine hydrochloride 30 mg, and dextromethorphan hydrobromide 10 mg 1. At 32.26 kg, this child falls well within the weight range where standard pediatric dosing applies.
Weight-Based Considerations
- This child is above the 30 kg threshold where weight-based dosing transitions toward adult dosing regimens 2
- For children ≥40 kg, adult dosing should be used unless contraindicated 3
- At 32.26 kg, this patient sits in the intermediate zone where standard pediatric dosing (5 mL) is appropriate
Component-Specific Dosing Analysis
Brompheniramine (2 mg per dose):
- Guideline recommendations support 1-2 mg twice daily for children ≥2 years 4
- This dose provides effective H1-receptor blockade with peak plasma concentrations at 3.2 hours and terminal half-life of 12.4 hours in children 5
- The 2 mg dose produces significant wheal and flare suppression lasting 30 hours 5
Pseudoephedrine (30 mg per dose):
- The terminal elimination half-life in children (3.1 hours) is significantly shorter than in adults, necessitating more frequent dosing 6
- This dose provides effective nasal decongestion with onset within 30 minutes and peak activity at 1 hour 1
Critical Safety Warnings
Age-Related Precautions
- Oral decongestants are well-tolerated in children >6 years but carry significant risks in younger children 4
- Use below age 6 has been associated with agitated psychosis, ataxia, hallucinations, and death 4
- Even at recommended doses, stimulatory effects including tachyarrhythmias, insomnia, and hyperactivity may occur 4
Contraindications and Monitoring
- Avoid concurrent use with stimulant medications (e.g., ADHD medications) or caffeine due to increased adverse events 4
- Monitor blood pressure, especially if hypertension is present 4
- Use with extreme caution in cardiovascular disease, hyperthyroidism, closed-angle glaucoma, or bladder neck obstruction 4
Overdose Risk
The toxic dose of brompheniramine in a 2.5-year-old child was 300-900 mg (survived), while pseudoephedrine toxicity is estimated at <50 mg/kg 1. At 32.26 kg, this would be <1,613 mg pseudoephedrine—far exceeding therapeutic doses, but emphasizing the importance of strict dosing adherence.
Dosing Schedule
- Frequency: Every 4-6 hours as needed
- Maximum: 4 doses (20 mL total) in 24 hours
- Duration: Brompheniramine provides 24-hour peripheral H1-blockade from a single dose, suggesting twice-daily dosing may be sufficient 5
Common Pitfalls to Avoid
- Do not use weight-based mg/kg calculations for combination OTC products—follow labeled dosing 1
- Do not exceed maximum daily doses to avoid CNS stimulation, anticholinergic effects, and cardiovascular complications 1
- Verify the specific Bromfed formulation as different products exist with varying concentrations
- Assess for concurrent medications that may interact, particularly other sympathomimetics or anticholinergics