NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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What is the active ingredient in Zosyn?

  1. Amoxicillin

  2. Piperacillin/tazobactam

  3. Dicloxacillin

  4. Cephalexin

The correct answer is: Piperacillin/tazobactam

The correct answer is B: Piperacillin/tazobactam. Zosyn is a brand name for the combination of piperacillin, an antibiotic that works by inhibiting the bacterial cell wall synthesis, and tazobactam, a beta-lactamase inhibitor that helps protect piperacillin from being degraded by certain resistant bacteria. This combination is effective against a variety of bacteria, making it a commonly used broad-spectrum antibiotic for treating various infections. The other options are not the active ingredient in Zosyn: - Amoxicillin is a penicillin antibiotic but not the active ingredient in Zosyn. - Dicloxacillin is another type of penicillin antibiotic, not found in Zosyn. - Cephalexin is a cephalosporin antibiotic and is also not the active ingredient in Zosyn.

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