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MDC Pharmacokinetics (PK) II Practice Exam

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Which antibiotic is a beta-lactam antibiotic combined with clavulanic acid?
Correct Answer:
Amoxicillin + Clavulanic acid
Explanation:
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.

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