Which antibiotic is a beta-lactam antibiotic combined with clavulanic acid?

• A. Amoxicillin
• B. Amoxicillin + Clavulanic acid
• C. Co-Amoxiclav
• D. Rifampicin

Answer: (B)

Clavulanic acid acts as a beta-lactamase inhibitor, meaning it blocks the enzymes some bacteria produce that would destroy a beta-lactam antibiotic. When you pair a beta-lactam antibiotic like amoxicillin with clavulanic acid, the combination is protected from those enzymes, so the drug can work against a broader range of organisms that would otherwise inactivate it. That’s why the product you’re looking for is amoxicillin combined with clavulanic acid, often sold as Co-amoxiclav. This pairing enhances effectiveness against beta-lactamase–producing bacteria. Amoxicillin by itself is just a beta-lactam antibiotic without the inhibitor, and rifampicin is a different class altogether.