Please consult your physician before taking any medication. Generic Name: amoxicillin (am OX i sil in) Amoxil (amoxicillin) is a penicillin antibiotic. It fights bacteria in your body. Amoxil is used to treat many different types of infections caused by bacteria, such as ear infections, bladder infections, pneumonia, gonorrhea, and E. coli or salmonella infection. Amoxil is also sometimes used together with another antibiotic called clarithromycin (Biaxin) to treat stomach ulcers caused by Helicobacter pylori infection. This combination is sometimes used with a stomach acid reducer called lansoprazole (Prevacid). Amoxil may also be used for purposes not listed in this medication guide.