Amoxicillin-Clavulanate vs Amoxicillin for Sinusitis - Summary - MDSpire
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Amoxicillin-Clavulanate vs Amoxicillin for Sinusitis

Amoxicillin-clavulanate was not linked to lower treatment failure but was associated with a slightly higher risk of secondary infections compared with amoxicillin in adults with uncomplicated acute sinusitis.

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A retrospective study analyzed treatment outcomes for uncomplicated acute sinusitis in over 520,000 commercially insured adults aged 18-64. Researchers found that treatment failure rates were similar between standard-dose amoxicillin-clavulanate and standard-dose amoxicillin, at approximately 3% for both groups. Despite a higher occurrence of secondary infections with amoxicillin-clavulanate (1.2% vs 0.8%), antibiotic-associated adverse events were comparable. The study supports amoxicillin as the preferred first-line antibiotic due to its similar efficacy and lower risk of complications.

Original Source(s)

Amoxicillin-Clavulanate vs Amoxicillin for Sinusitis

  • by Kathryn Wighton

  • April 20, 2026

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