Treatment of Streptococcal Pharyngitis

First-Line Treatment Options

The American Academy of Family Physicians recommends penicillin or amoxicillin for 10 days as first-line therapy for patients without tonsils with streptococcal pharyngitis 1
Penicillin V is the preferred first-line agent due to its narrow spectrum, proven efficacy, safety, and low cost, with a dosage of 250 mg two or three times daily for 10 days for children, and 250 mg four times daily or 500 mg twice daily for 10 days for adolescents and adults 1
Amoxicillin is equally effective and often preferred in children due to better taste acceptance, with a dosage of 50 mg/kg once daily (maximum 1,000 mg) for 10 days 1

For non-immediate penicillin allergy, first-generation cephalosporins such as cephalexin (20 mg/kg per dose twice daily, maximum 500 mg per dose) or cefadroxil (30 mg/kg once daily, maximum 1 g) can be used for 10 days 1
For immediate-type hypersensitivity to penicillin, clindamycin (7 mg/kg per dose three times daily, maximum 300 mg per dose) is the preferred alternative for 10 days 1

The full 10-day course of penicillin or most oral antibiotics is essential to achieve maximal pharyngeal eradication of streptococci, with shorter courses not being adequately validated 1, 2
Azithromycin requires only 5 days due to its prolonged tissue half-life, but should be reserved for patients with true penicillin allergy 1

Retreatment with the same regimen can be considered if compliance was adequate, or intramuscular benzathine penicillin G if compliance is questionable 2
Clindamycin can be used for chronic carriers or multiple treatment failures, with a dosage of 20-30 mg/kg per day in three doses (maximum 300 mg per dose) for 10 days 1

Acetaminophen or NSAIDs may be used for symptom relief, while avoiding aspirin in children and corticosteroids due to lack of recommendation 1