What is amoxicillin used for? Amoxicillin is an antibiotic that is commonly used for infections caused by certain bacteria. Amoxicillin may also be used for other conditions as determined by your... Find out how amoxicillin treats bacterial infections such as chest infections and dental abscesses, and how to take it. NHS medicines information on amoxicillin – what it's used for, side effects, dosage and who can take it. Amoxicillin is a prescription antibiotic which is used to treat a wide variety of bacterial infections. Learn about uses, side effects, drug interactions, dosages, warnings, and more. Amoxycillin 500 MG Capsule is an antibiotic. It is used orally to treat different types of bacterial infections of the throat, lungs, ears, nose, urinary tract, and skin. Amoxycillin 500 MG Capsule is also used with other medications to stop the growth and kill Helicobacter pylori bacteria that cause stomach ulcer (s).