Broxil (Feneticillin) is NOT Appropriate for Streptococcus pyogenes Pharyngitis
The FDA-labeled Broxil product in the evidence is a topical benzoyl peroxide acne medication, not an oral antibiotic, and therefore cannot be used to treat streptococcal pharyngitis 1. You appear to have confusion about the product name.
If You Actually Have Access to Feneticillin (Phenethicillin)
If you're referring to feneticillin/phenethicillin (a penicillinase-sensitive penicillin similar to penicillin V), the appropriate dosing would follow standard penicillin V guidelines, as feneticillin is pharmacologically equivalent:
Recommended Dosing for GAS Pharyngitis
For patients without penicillin allergy, use penicillin V or amoxicillin as first-line therapy for 10 days 2:
Children:
- Penicillin V: 250 mg twice daily OR three times daily for 10 days (strong recommendation, high-quality evidence) 2
- Alternative: Amoxicillin 50 mg/kg once daily (max 1000 mg) OR 25 mg/kg twice daily (max 500 mg per dose) for 10 days 2
Adolescents and Adults:
- Penicillin V: 250 mg four times daily OR 500 mg twice daily for 10 days (strong recommendation, high-quality evidence) 2
- Alternative: Amoxicillin dosing as above 2
Why These Specific Regimens
The twice-daily dosing of penicillin V (500 mg BID) is equally effective as more frequent dosing and improves compliance 3, 4, 5. Once-daily penicillin dosing is associated with 12 percentage points lower cure rates and should NOT be used 5. However, once-daily amoxicillin at 50 mg/kg (max 1000 mg) has proven efficacy 2.
Critical Points
- Duration must be 10 days - shorter courses increase treatment failure 2
- Penicillin remains the drug of choice due to narrow spectrum, proven efficacy, safety, and low cost 2
- No penicillin resistance has ever been documented in Group A Streptococcus 2
- Treatment prevents acute rheumatic fever, suppurative complications, reduces contagiousness, and shortens symptom duration 2
Common Pitfall to Avoid
Do not confuse brand names across different countries - verify the actual active ingredient. The "Broxil" in the FDA database is benzoyl peroxide for acne, not an antibiotic 1.