Question

The health care provider is selecting an antibiotic for a client with a known penicillin allergy. The provider knows that cephalosporins are a poor choice for this client because cephalosporins:

Answer 1

Answer:

Possibility of cross allergic reaction

Explanation:

    In patients with a history of severe hypersensitivity reaction to penicillins, the use of  Cephalosporins should be avoided. Given the chemical similarity of the classes, there is a  possibility of cross allergic reaction.

   Penicillin and cephalosporin are part of the same family of antibiotics (beta-lactams) and have a similar, but not equal, physical structure, where the two substances share the same R1 chain and the same beta-lactam ring chain.

   When a history of severe allergy to IgE-mediated penicillin, such as anaphylaxis, is contraindicated the use of cephalosporin of any generation.