A client taking an MAO inhibitor for hypertension asks the nurse for medication to relieve nasal congestion. The nurse should know that phenylephrine will be a poor choice for this client because it might cause which condition?
1. Tinnitus
2. Hypokalemia
3. Dizziness
4. Hypertension
Correct Answer: 4
Rationale 1: Phenylephrine does not cause tinnitus. If it is given within 21 days of an MAO inhibitor, hypertensive crisis can occur.
Rationale 2: Phenylephrine does not cause hypokalemia. If it is given within 21 days of an MAO inhibitor, hypertensive crisis can occur.
Rationale 3: Phenylephrine does not cause dizziness. If it is given within 21 days of an MAO inhibitor, hypertensive crisis can occur.
Rationale 4: Phenylephrine should not be administered within 21 days of an MAO inhibitor, or a hypertensive crisis could occur.
Global Rationale: Phenylephrine should not be administered within 21 days of an MAO inhibitor, or a hypertensive crisis could occur. Phenylephrine does not cause tinnitus, hypokalmia, or dizziness.
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