Problem:
A nurse is caring for a client who develops hives after a new antibiotic is administered. Which of the following is the mechanism by which diphenhydramine (Benadryl) reduces the client's allergic reaction? • A. Metabolizes histamine and inhibits the release orsubstances that cause intense itching • B. Competes with histamine for receptors and interferes with vasodilation • C. Dilates capillaries within the tissues • D. Destroys histamine in the tissues to stop the allergic response.