Amoxicillin/clavulanic acid, also known as co-amoxiclav or amox-clav, sold under the brand name Augmentin, among others, is an antibiotic medication used for the treatment of a number of bacterial infections. It is a combination consisting of amoxicillin, a β-lactam antibiotic, and potassium clavulanate, a β-lactamase inhibitor. It is specifically used for otitis media, streptococcal pharyngitis, pneumonia, cellulitis, urinary tract infections, and animal bites. It is taken by mouth or by injection into a vein. Common side effects include diarrhea, vomiting, and allergic reactions. It also increases the risk of yeast infections, headaches, and blood clotting problems. It is not recommended in people with a history of a penicillin allergy. It is relatively safe for use during pregnancy. Amoxicillin/clavulanic acid was approved for medical use in the United States in 1984. It is on the World Health Organization's List of Essential Medicines. The World Health Organization classifies amoxicillin/clavulanic-acid as critically important for human medicine. It is available as a generic medication. In 2020, it was the 107th most commonly prescribed medication in the United States, with more than 6 million prescriptions. Amoxicillin/clavulanic acid is widely used to treat or prevent many infections caused by susceptible bacteria, such as: urinary tract infections respiratory tract infections skin and soft tissue infections sinus infections tonsillitis cat scratches infections caused by the bacterial flora of the mouth, such as: dental infections infected animal bites infected human bites (including uncomplicated "clenched-fist" or "reverse-bite" injuries) It is also used for tuberculosis that is resistant to other treatments. The World Health Organization recommends giving amoxicillin-clavulanate along with meropenem as one of the therapeutic options in drug resistant tuberculosis. However, across the spectrum of dosage of amoxicillin-clavulanate combination, the dose of clavulanate is constant at 125 mg, whereas the dose of amoxicillin varies at 250 mg, 500 mg and 875 mg.