Question

a nurse is caring for a client who is taking diphenhydramine for insomnia and reports drowsiness. the nurse should identify that drowsiness indicates which of the following? therapeutic effect adverse reaction contraindication precaution

Explanation:

Diphenhydramine is an antihistamine used for insomnia, and drowsiness is its intended (therapeutic) effect to help with sleep. An adverse reaction would be an unwanted effect, contraindication is a reason to not use the drug, and precaution is a measure taken before use. Here, drowsiness helps the client sleep, so it's a therapeutic effect.

Answer:

A. Therapeutic effect