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5-day oral antibiotics as effective as 10-day course for pediatric GAS pharyngitisShorter antibiotic courses may treat strep throat in children
medRxivPublished July 7, 2026Study authors: Lima, J. P.; Dorri, M.; Ling, M.; Lee, B.; Kirsh, S.; Dhanoya, S.; Walch, A.; Jassal, T.; Raji Lahij…DOI ↗Editorial oversight: Dr. Amelia Tan, PhD · Internal Medicine & Chronic Disease
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Key Takeaway
Consider 5-day oral antibiotics as an effective alternative to 10-day regimens for pediatric GAS pharyngitis.
This systematic review and dose-response meta-analysis included 22,636 children and adolescents (≤18 years) with suspected or confirmed group A streptococcal (GAS) pharyngitis in high-income settings. The review compared oral antibiotic durations of 3, 5, and 10 days, with placebo or no treatment as comparators. The primary outcome was clinical cure; secondary outcomes included relapse and adverse events.
For clinical outcomes at 3, 5, and 10 days, the review found little to no difference. When directly comparing 5 versus 10 days, effects on clinical cure, relapse, and adverse events were similar. Adverse events were rare overall; among 9,096 participants, there were no deaths, 4 cases of acute rheumatic fever, and 4 cases of post-streptococcal glomerulonephritis.
The authors note that evidence on 3-day courses came almost exclusively from trials of azithromycin, limiting inference about shorter penicillin regimens. Certainty was low to moderate for the 3-, 5-, and 10-day comparison, moderate for 5 versus 10 days, and lower for 3 versus 10 days. Findings apply most directly to high-income settings.
In practice, this challenges the long-standing 10-day standard, suggesting 5 days of oral antibiotics are likely as effective and safe as 10 days for pediatric GAS pharyngitis in high-income settings.
How this fits prior evidence
This review extends prior findings on azithromycin for GAS pharyngitis by focusing on treatment duration rather than drug choice. Prior coverage indicated that cefdinir and cefprozil show superior eradication rates compared to penicillin V, and that azithromycin may have inferior efficacy. The current review's reliance on azithromycin for 3-day course data reinforces the limitation of shorter penicillin regimens. It also contrasts with azithromycin's benefit in maternal infection reduction, highlighting context-specific efficacy.
Parents often worry about the long duration of antibiotics needed to clear up a child's strep throat. The standard treatment has traditionally been a 10-day course, but new data suggests that shorter treatments might work just as well.
Researchers looked at results from over 22,000 children and adolescents with Group A Streptococcal Pharyngitis. They compared three different lengths of oral antibiotics: 3, 5, and 10 days. The findings showed little to no difference in clinical success between the 5-day and 10-day options. While the evidence for a 3-day course is less certain, the data suggests that 5 days may be just as safe and effective as the traditional 10-day plan.
It is important to note that these findings are most reliable for high-income settings. Also, because much of the data for 3-day courses came specifically from azithromycin trials, we cannot say for certain if other types of antibiotics behave the same way over shorter periods.
What this means for you:
A 5-day course of oral antibiotics may be as effective and safe as a 10-day course for children with strep throat.
Common questions
How does a 5-day treatment compare to a 10-day treatment?
The review found similar effects for both 5-day and 10-day courses. There was little to no difference in clinical cure, relapse rates, or adverse events when comparing these two durations of oral antibiotics.
Can a 3-day course be used instead of 10 days?
The evidence for a 3-day course is less certain than the 5-day option. Because most 3-day data came from azithromycin trials, we cannot be sure if other antibiotics are equally effective over such a short period.
Background: Group A streptococcal (GAS) pharyngitis drives substantial antibiotic prescribing in children. The 10-day standard burdens adherence and prolongs exposure, increasing selective pressure for resistance. Yet, whether shorter courses achieve comparable outcomes remains unresolved. Purpose: To address how the duration of oral antibiotics affects clinical outcomes in children and adolescents with suspected or confirmed GAS pharyngitis. Data Sources: MEDLINE, Embase, CENTRAL, Web of Science, and CINAHL from inception to July 2025. Reviewers also searched reference lists of eligible trials and relevant systematic reviews. Study Selection: Randomized trials enrolling children and adolescents [≤]18 years with suspected or confirmed GAS pharyngitis comparing different durations of oral antibiotics, or oral antibiotics against placebo or no treatment. Data Extraction: Paired reviewers independently screened records, extracted data, and assessed risk of bias. Data Synthesis: We performed random-effects dose-response meta-analyses with restricted cubic splines and rated the certainty of evidence using GRADE. Forty-five trials enrolling 22,636 participants met eligibility criteria. Across outcomes, low to moderate certainty evidence suggests that 3, 5, and 10 days of antibiotic treatment may produce little to no difference. Moderate certainty evidence supports similar effects of 5 and 10 days on clinical cure, relapse, and adverse events. Evidence comparing 3 and 10 days carries lower certainty. Serious adverse events were rare: no deaths, 4 cases of acute rheumatic fever, and 4 cases of post-streptococcal glomerulonephritis among 776, 8,818, and 9,096 participants, respectively, making clinically important differences across treatment durations unlikely. Limitations: Evidence on 3-day courses came almost exclusively from trials of azithromycin, limiting inference about shorter penicillin regimens. Findings apply most directly to high-income settings. Conclusion: These findings challenge the long-standing 10-day standard for pediatric GAS pharyngitis and show that 5 days of oral antibiotics are likely as effective and safe as 10 days.
