Clauvanic Acid Products | Cleanchem - Clauvanic acid, more commonly known as clavulanic acid, is a beta-lactamase inhibitor often combined with penicillin antibiotics, such as amoxicillin. It works by inhibiting the beta-lactamase enzymes produced by resistant bacteria, thereby enhancing the effectiveness of penicillins. It is used to treat infections caused by beta-lactamase-producing bacteria. Side effects are generally mild and may include gastrointestinal discomfort.