A combination of the semisynthetic broad-spectrum antibiotic amoxicillin and the beta-lactamase enzyme inhibitor clavulanate potassium. Clavulanate potassium increases the serum half-life of amoxicillin by inhibiting beta-lactamase-mediated metabolism of amoxicillin. Amoxicillin inhibits bacterial cell wall synthesis by binding to penicillin binding proteins and inhibiting peptidoglycan synthesis, a critical component of bacterial cell walls.