First-line antibiotic for acute sinusitis is Augmentin 1000/62.5 for 7-10 days.

First-line antibiotic for acute sinusitis is Augmentin 1000/62.5 for 7-10 days.

• A. Azithromycin
• B. Doxycycline
• C. Augmentin 1000/62.5 for 7-10 days
• D. Amoxicillin

Answer: (C)

Covering the common sinusitis pathogens and their resistance patterns is why this approach is favored. Augmentin combines amoxicillin with clavulanate, a beta-lactamase inhibitor, which broadens the antibiotic’s activity to include beta-lactamase–producing strains of Haemophilus influenzae and Moraxella catarrhalis and also helps against some penicillin-resistant Streptococcus pneumoniae. Plain amoxicillin alone can fail when these organisms produce beta-lactamase, so adding clavulanate makes the regimen much more reliable for acute sinusitis. Using a higher-dose amoxicillin–clavulanate (1000/62.5 mg) twice daily ensures adequate drug exposure to overcome resistance in many adults, and a 7–10 day course is a typical duration that balances effectiveness with tolerability and helps prevent relapse. Alternatives like macrolides or doxycycline exist, but their effectiveness is diminished by rising resistance among the usual pathogens, and plain amoxicillin lacks the beta-lactamase protection, making them less reliable as first-line options. For these reasons, Augmentin 1000/62.5 for 7–10 days is the best first-line choice.

Covering the common sinusitis pathogens and their resistance patterns is why this approach is favored. Augmentin combines amoxicillin with clavulanate, a beta-lactamase inhibitor, which broadens the antibiotic’s activity to include beta-lactamase–producing strains of Haemophilus influenzae and Moraxella catarrhalis and also helps against some penicillin-resistant Streptococcus pneumoniae. Plain amoxicillin alone can fail when these organisms produce beta-lactamase, so adding clavulanate makes the regimen much more reliable for acute sinusitis.

Using a higher-dose amoxicillin–clavulanate (1000/62.5 mg) twice daily ensures adequate drug exposure to overcome resistance in many adults, and a 7–10 day course is a typical duration that balances effectiveness with tolerability and helps prevent relapse.

Alternatives like macrolides or doxycycline exist, but their effectiveness is diminished by rising resistance among the usual pathogens, and plain amoxicillin lacks the beta-lactamase protection, making them less reliable as first-line options. For these reasons, Augmentin 1000/62.5 for 7–10 days is the best first-line choice.