Question

a nurse is teaching an adult client about diphenhydramine. the nurse should inform the client to expect which of the following adverse effects while taking this medication? muscle tremors drowsiness excitation insomnia

Explanation:

Diphenhydramine is a first-generation antihistamine, which readily crosses the blood-brain barrier and binds to central histamine receptors, leading to sedation as a common, expected adverse effect in adult clients. Muscle tremors, excitation, and insomnia are not typical primary adverse effects for adults taking this medication; excitation may occur in pediatric clients but not adults.

Answer:

B. Drowsiness