Augmentin is a combination antibiotic containing amoxicillin and clavulanate potassium, used to treat a wide range of bacterial infections, including respiratory tract infections, ear infections, sinusitis, urinary tract infections, and skin infections. Amoxicillin, a penicillin-type antibiotic, works by stopping bacterial growth, while clavulanate potassium helps prevent bacterial resistance by inhibiting beta-lactamase enzymes. This combination enhances effectiveness against certain antibiotic-resistant bacteria, making Augmentin a broad-spectrum treatment option.