A nurse is reviewing the medical record of a client who just returned to the unit following surgery and notes the client has a history of anaphylaxis in response to penicillin. The client's postoperative prescriptions include a dose of cephalexin. Which of the following actions should the nurse take?

B Confirm with the client that the reaction he had was truly anaphylaxis. D Notify the provider to request a different antibiotic. A Ask the provider to prescribe diphenhydramine as a precaution. C Administer the medication.