Which statement best describes cross-sensitivity between cephalosporins and penicillins and a common nursing consideration?

Which statement best describes cross-sensitivity between cephalosporins and penicillins and a common nursing consideration?

• A. There is no cross-reactivity; monitor for GI upset.
• B. Possible penicillin allergy cross-reactivity; monitor for allergic reactions and GI upset; use with caution in penicillin-allergic patients.
• C. Cross-reactivity guarantees allergy; avoid cephalosporins in all patients with penicillin allergy.
• D. Only occurs with first-generation cephalosporins; no special nursing considerations.

Answer: (B)

The potential for cross-sensitivity between penicillins and cephalosporins comes from their shared beta-lactam structure, so a penicillin allergy history is important when starting a cephalosporin. In practice, this means assessing whether the patient’s penicillin reaction was a mild rash or a severe, immediate hypersensitivity like anaphylaxis, and then monitoring closely after administration. Be vigilant for signs of an allergic reaction (hives, itching, swelling, wheezing, trouble breathing) and also for common antibiotic adverse effects such as GI upset. Because cross-reactivity is possible, use cephalosporins with caution in penicillin-allergic patients, and consider alternatives if the allergy was severe. While the risk is lower with later-generation cephalosporins and with different side chains, being prepared to manage anaphylaxis and documenting the patient’s history are essential nursing considerations.

The potential for cross-sensitivity between penicillins and cephalosporins comes from their shared beta-lactam structure, so a penicillin allergy history is important when starting a cephalosporin. In practice, this means assessing whether the patient’s penicillin reaction was a mild rash or a severe, immediate hypersensitivity like anaphylaxis, and then monitoring closely after administration. Be vigilant for signs of an allergic reaction (hives, itching, swelling, wheezing, trouble breathing) and also for common antibiotic adverse effects such as GI upset. Because cross-reactivity is possible, use cephalosporins with caution in penicillin-allergic patients, and consider alternatives if the allergy was severe. While the risk is lower with later-generation cephalosporins and with different side chains, being prepared to manage anaphylaxis and documenting the patient’s history are essential nursing considerations.