A 79-year-old client on trihexyphenidyl for Parkinson tremor… | MyMerci
Crisis Intervention PSI
Question

A 79-year-old client on trihexyphenidyl for Parkinson tremor is hospitalized with new confusion, urinary retention, and dry mouth. Which is the nurse's most appropriate interpretation?

Explanation
Correct (2): The constellation — confusion, dry mouth, urinary retention, constipation, blurred vision — is classic anticholinergic toxicity. Beers Criteria strongly recommend AVOIDING anticholinergic antiparkinsonian drugs (trihexyphenidyl, benztropine) in older adults due to delirium, fall, and cognitive decline risk; safer alternatives (carbidopa-levodopa, amantadine) are preferred. (1) Not normal. (3) PE has different presentation. (4) NMS requires fever, rigidity, autonomic instability.

In-depth explanation

Memory Tip Anticholinergic toxicity = "Hot as a hare, Dry as a bone, Red as a beet, Blind as a bat, Mad as a hatter, Full as a flask" — hyperthermia, dry, flushed, mydriasis, delirium, urinary retention.

Clinical scenario

Scenario 79-year-old male, Parkinson disease on trihexyphenidyl 4 mg/day, admitted with new confusion, urinary retention, dry mouth, constipation, blurred vision.

Key concepts

Browse all questions No login required

Master the NCLEX-RN with MyMerci

Thousands of NCLEX-style questions with detailed rationale — in your language. Track your progress and study smarter.

Start for free
Read in another language: English한국어日本語繁體中文Tiếng Việt

For study reference only. Always follow current clinical guidelines and your institution’s protocols.