Treatment for Strep Throat

First-line Treatment Options

The American Academy of Pediatrics recommends oral Penicillin V as the standard treatment for strep throat, with a dosage of 250 mg twice or three times daily for 10 days for children, and 250 mg three or four times daily OR 500 mg twice daily for 10 days for adolescents and adults 1, 2
The Infectious Diseases Society of America prefers Intramuscular Benzathine Penicillin G for patients who are unlikely to complete the full 10-day course of oral therapy, with a standard dose of 1.2 × 10^5 units as a single dose 1, 2, 3
Amoxicillin is often used in place of oral penicillin V for young children due to better taste acceptance, with equal efficacy 2

The American Heart Association recommends Erythromycin as the alternative for patients with penicillin allergy, with a dosage of 20-40 mg/kg/day divided twice or three times daily for 10 days for erythromycin estolate, and 40 mg/kg/day divided twice or three times daily for 10 days for erythromycin ethyl succinate 1, 2, 3
First or second-generation cephalosporins are acceptable alternatives for patients who do not exhibit immediate hypersensitivity to β-lactam antibiotics, according to the Infectious Diseases Society of America 1, 4
Clindamycin is recommended for patients with severe penicillin allergies, such as anaphylaxis, angioedema, respiratory distress, or urticaria, by the American College of Cardiology 5, 4

The standard duration of treatment is 10 days for most oral antibiotics to achieve maximal pharyngeal eradication of group A streptococci, as recommended by the Centers for Disease Control and Prevention 1, 2

A small percentage of patients will have recurrences of acute pharyngitis with positive cultures for group A streptococci shortly after completing treatment, according to the American Academy of Family Physicians 1
Treatment options for recurrences include retreatment with the same antimicrobial agent used initially, or intramuscular benzathine penicillin G if previously treated with oral agents and compliance is questionable, as recommended by the Infectious Diseases Society of America 1

Inadequate treatment duration can lead to complications such as rheumatic fever, and the full 10-day course must be completed, as emphasized by the American Heart Association 1
Sulfonamides and tetracyclines should not be used due to higher resistance rates and frequent failure to eradicate even susceptible organisms, according to the Infectious Diseases Society of America 3, 5
Routine post-treatment throat cultures are not recommended for asymptomatic patients who have completed therapy, as stated by the Centers for Disease Control and Prevention 1, 6

For patients with multiple treatment failures, consider alternative diagnoses or the possibility of a streptococcal carrier state with concurrent viral infections, as suggested by the American Academy of Pediatrics 6
The risk of cross-reactivity between penicillins and cephalosporins is lower than previously thought, especially with later-generation cephalosporins, according to the Infectious Diseases Society of America 4