XICLAV 500/125 MG is a broad-spectrum antibiotic containing a combination of Amoxicillin (500 mg), a penicillin-class antibiotic, and Clavulanic Acid (125 mg), a β-lactamase inhibitor. This combination enhances the effectiveness of amoxicillin against β-lactamase-producing bacteria, which would otherwise be resistant to standard penicillins.