A patient is developing hives after the administration of blood products. The physician has ordered a one time dose of diphenhydramine. Which of the following side effects can the nurse expect?

Dry mouth
Sedation

Explanation

•Diphenhydramine is a first-generation antihistamine.

•Side effects of this class of drugs include sedation and the anticholinergic effects of dry mouth, blurred vision, constipation, and difficulty urinating.

•The incorrect answers are urinary incontinence, excessive salvation, and bradycardia because they are the opposite of the expected anticholinergic effects caused by diphenhydramine.

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