A nurse is caring for a client who develops an anaphylactic reaction to antibiotic administration. After assessing the client’s respiratory status and stopping the medication infusion, which of the following actions should the nurse take next?

A. Give diphenhydramine IM. This action is incorrect because while diphenhydramine can help manage allergic reactions, it is not the first-line treatment for anaphylaxis. Epinephrine is the priority medication for anaphylactic reactions. B. Elevate the client’s legs and feet. This action is incorrect because while elevating the legs can help with shock, it is not the immediate priority in anaphylaxis. Administering epinephrine is the most critical step. C. Administer epinephrine IM. This action is correct because epinephrine is the first-line treatment for anaphylaxis. It helps to reverse the severe symptoms of anaphylaxis, including airway constriction and low blood pressure. D. Replace the infusion with 0.9% sodium chloride. This action is incorrect because while replacing the infusion can help maintain fluid balance, it is not the immediate priority. Administering epinephrine is the most critical step.