A nurse is providing an in-service to the unit about medications that are classified as antihistamines.Which of the following medications are considered an antihistamine? (Select All That Apply).

Choice A rationaleCetirizine is an antihistamine used to relieve allergy symptoms such as runny nose, itching, and sneezing. It works by blocking histamine, a substance in the body that causes allergic reactions.Choice B rationaleDiphenhydramine is also an antihistamine used to treat symptoms of allergy, hay fever, and the common cold. It works by blocking the effects of histamine in the body.Choice C rationaleBeclomethasone is a corticosteroid used to prevent and control symptoms such as wheezing and shortness of breath caused by asthma. It is not classified as an antihistamine.Choice D rationalePhenylephrine is a decongestant used to relieve nasal discomfort caused by colds, allergies, and hay fever. It is not classified as an antihistamine.