RN Exam Practice
Reduction of Risk PotentialQuestion 2227 of 2368

An older client taking diphenhydramine is assessed by the nurse. Which anticholinergic effect should the nurse expect?

  1. Increased salivation
  2. Diarrhea
  3. Increased tear formation
  4. Urinary retention
Show answer

Correct answer: Urinary retention

First-generation antihistamines cause anticholinergic effects such as dry mouth, urinary retention, constipation and blurred vision, and need caution in older adults.

Source: Nursing Pharmacology, 2nd edition (Open RN, Chippewa Valley Technical College, 2023), Respiratory System: ANTIHISTAMINES. Licensed under CC BY 4.0.

Practice the topic "Reduction of Risk Potential"

Questions last reviewed: 18 October 2026