Yes. Amoxicillin is used to treat infections. For most infections in adults, the dosing regimens for Amoxicillin are 250 mg every 8 hours, 500 mg every 8 hours, 500 mg every 12 hours, or 875 mg. This is what I found about Bactrim and sinus infections: Eliminate infection. The chief goal of treatment is wiping out bacteria from the sinus cavaties with antibiotics. Doctors give unbiased, trusted information on whether Amoxicillin can cause or treat Toothache: Dr. Raff on dosage of amoxicillin for tooth infection: What type of tooth infection? Like many other conditions, antibiotics serve as a supplement to surgical intervention. A dental abscess may need drainage or extraction. If going to be effective. The following drugs can be used to treat sinus infections; antibiotics like amoxicillin amoxicillin-clavulanate, Augmentin, azithromycin Zithromax, levofloxacin Levaquin, trimethoprim-sulfamethoxazole Bactrim Septra. Augmentin is the brand name of a combination antibiotic drug containing amoxicillin and clavulanate potassium. It's used to treat bacterial infections in your airways, such as a sinus infection or. Amoxicillin Dosage for Sinus Infection. According to the official literature, the dosage of amoxicillin for adults can range from 250 mg. to 1 gm three times a day, depending on the severity of the infection. Doctors give unbiased, trusted information on whether Amoxicillin can cause or treat Urinary Tract Infection: Dr. Sucgang on amoxicillin for urinary tract infection dosage: Ereythromycin is virtually never used for UTIs except in rare cases of culture proven staphloccocal, streptococcocal or enterococcal UTIs sensitive to Erythromycin &. Facts. A bacterial sinus infection is treated primarily with antibiotics to ward off any infection. Due to the severity and longevity of the sinus infection, an individual may have to take larger doses of amoxicillin. A sinus infection, also known as sinusitis, is a very common upper respiratory tract infection that infects millions of people every year. It occurs when the membranes of the paranasal sinuses, which are the small air-filled spaces located within the skull around your nose, become inflamed. Learn about Amoxil (Amoxicillin) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications.