An antibiotic called Oneclav 500 mg/125 mg Tablet aids in the body's defense against bacterial infections. It is used to treat infections of the skin, soft tissues, nasal sinuses, ear, urinary tract, and lungs (such as pneumonia). Amoxycillin and Clavulanic Acid, two medications found in Oneclav 500 mg/125 mg Tablets, combine to eradicate infection-causing germs. Amoxycillin functions by inhibiting bacterial growth. Amoxycillin's antibacterial activity is increased and resistance is decreased by clavulanic acid. Many bacterial infections, including those of the ear, sinus, throat, lung, urinary system, skin, teeth, joints, and bones, can be treated with Oneclav 500 mg/125 mg tablets. In order to make sure that all bacteria are eliminated and do not develop resistance, you should continue taking it as directed even after you feel better, which normally happens in a few days.