A patient is admitted to the hospital after a severe hypersensitivity reaction to penicillin. Which of the following antibiotics should the patient avoid in the future?

Piperacillin and tazobactam


• A patient who has had an anaphylaxic reaction to penicillin will also be at risk for a reaction from cephalosporins and carbapenems.

• Penicillins, cephalosporins, and carbapenems all contain a beta-lactam ring in their biochemical makeup. This beta-lactam ring can cause an allergic or even an anaphylaxic reaction.

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