Amoxicillin-clavulanate (Augmentin) is also an appropriate first-line treatment of uncomplicated acute sinusitis. Other options include cephalosporins such as
cefpodoxime proxetil (Vantin) and cefuroxime (Ceftin). In patients allergic to beta-lactams, trimethoprim-sulfamethoxazole (Bactrim), clarithromycin (Biaxin), and azithromycin. So, if you are allergic to the penicillin group your doctor could have prescribed Bactrim for you. Regards.