Practice Question
A patient who experiences an adverse effect of a muscarinic antagonist would present with:
Answer Choices:
Correct Answer:
Low urine output
Rationale:
🟦 Muscarinic antagonists (anticholinergics) block parasympathetic (acetylcholine) activity in the body.
🟦 This blockade causes urinary retention by relaxing the detrusor muscle and tightening the urinary sphincter.
🟦 As a result, clients may experience difficulty voiding and decreased urine output.
🟦 Low urine output is a classic adverse effect seen with anticholinergic medications.
🟦 Recognizing this effect is essential to prevent bladder distention and urinary complications.
Hypernatremia
🟦 Anticholinergics do not directly alter serum sodium levels.
🟦 Electrolyte imbalance is not a typical adverse effect.
Hypovolemia
🟦 These drugs cause urinary retention, not fluid loss.
🟦 Hypovolemia is unrelated to muscarinic blockade.
Bradycardia
🟦 Muscarinic antagonists typically cause tachycardia, not slow heart rate.
🟦 Blocking parasympathetic input increases heart rate.
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This question is from Pharmacology Exam Final which contains 85 questions.
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Question Details
- Category: RN Nursing Exam(s)
- Subcategory: General Exams
- Domain: 🚑Pharmacology
- Answer Choices: 4