Amoxicillin is a Broad-spectrum antibiotic in the class of drugs called penicillins. It fights bacteria in the body. Amoxicillin is used to treat many different types of infections, such as tonsillitis, pneumonia, ear infections, bronchitis, urinary tract infections, gonorrhea, and infections of the skin. Amoxicillin may also be used for purposes other than those listed in this medication guide. If you are allergic to penicillin do not order this medication.