Treatment of Streptococcal Pharyngitis

First-Line Treatment Options

The American Academy of Pediatrics recommends oral penicillin V for adolescents, 250 mg four times daily or 500 mg twice daily for 10 days 1, 2
The Infectious Diseases Society of America recommends amoxicillin, 50 mg/kg once daily (maximum 1,000 mg) for 10 days, which may enhance adherence 1, 3
The Centers for Disease Control and Prevention suggest intramuscular benzathine penicillin G, 1.2 million units as a single dose, if oral adherence is a concern 4

For non-anaphylactic penicillin allergy, the American Academy of Pediatrics recommends first-generation cephalosporins (e.g., cephalexin) for 10 days 2

The Infectious Diseases Society of America recommends confirming diagnosis with rapid antigen detection test (RADT) and/or throat culture before initiating treatment 1, 2
A positive RADT is diagnostic and does not require backup culture, according to the American Academy of Pediatrics 2
The Centers for Disease Control and Prevention suggest a negative RADT in children and adolescents should be followed by a throat culture 2

The American Academy of Pediatrics recommends acetaminophen or NSAIDs for moderate to severe symptoms or high fever 1, 2
Aspirin should be avoided in children due to risk of Reye syndrome, as advised by the Infectious Diseases Society of America 1, 2

The American Academy of Family Physicians advises against treating without confirming diagnosis through testing, as clinical features alone cannot reliably distinguish between viral and bacterial pharyngitis 5, 1
The Infectious Diseases Society of America recommends against prescribing broad-spectrum antibiotics unnecessarily when narrow-spectrum options are effective 1, 2

The American Academy of Pediatrics recommends routine post-treatment throat cultures are not recommended unless symptoms persist or recur 1, 2
The Infectious Diseases Society of America suggests patients with recurrent episodes should be evaluated to determine whether they are experiencing true recurrent infections or are a chronic carrier with viral infections 3, 6

The Infectious Diseases Society of America recommends a 10-day treatment course with penicillin, amoxicillin, first-generation cephalosporins, clindamycin, and clarithromycin for streptococcal pharyngitis to maximize eradication of Group A Streptococcus from the pharynx and prevent acute rheumatic fever 7, 8, 9, 10
Penicillin V or amoxicillin should be administered for 10 days to maximize eradication of Group A Streptococcus from the pharynx and prevent acute rheumatic fever 7, 8, 9, 10
First-generation cephalosporins require 10 days of treatment for non-anaphylactic penicillin allergy 7, 10
Clindamycin and clarithromycin require 10 days of treatment for anaphylactic penicillin allergy 7, 10

Azithromycin is the only antibiotic approved for a shorter 5-day course in penicillin-allergic patients 7, 10

A Cochrane review found that 3-6 day courses of newer antibiotics showed comparable clinical efficacy to 10-day penicillin courses, with shorter fever duration and throat soreness 11
Major guidelines do not recommend shorter courses for standard penicillin or amoxicillin therapy because the evidence comparing different antibiotic classes makes direct comparisons difficult 11

The 10-day duration prevents acute rheumatic fever, which remains the primary justification for the full treatment course 7
The 10-day duration maximizes bacterial eradication from the pharynx 7, 8, 9

Do not prescribe shorter courses of penicillin or amoxicillin (less than 10 days) as this is not supported by current guidelines and may increase risk of treatment failure 7, 11
Do not assume all antibiotics can be given for 5 days - only azithromycin has this approved shorter duration 7, 10