Does This Patient Have Sinusitis?

Randomised, double blind, placebo controlled trial of penicillin V and amoxycillin in treatment of acute sinus infections in adults

“…Previous studies of antibiotic treatment of acute sinusitis5 6 have met criticism 7. To meet this criticism the present study was randomised, double blind, and placebo controlled, with matched treatment groups of patients seen in general practice.…”