The physician orders a potassium channel blocker for a client. Which medication would the nurse anticipate the physician to order?
1. Amiodarone (Cordarone)
2. Disopyramide (Norpace)
3. Lidocaine (Xylocaine)
4. Mexiletine (Mexitil)
Correct Answer: 1
Rationale 1: Amiodarone (Cordarone) is a potassium channel blocker.
Rationale 2: Disopyramide (Norpace) is incorrect because it is a sodium channel blocker.
Rationale 3: Lidocaine (Xylocaine) is incorrect because it is a sodium channel blocker.
Rationale 4: Mexiletine (Mexitil) is incorrect because it is a sodium channel blocker.
Global Rationale: Amiodarone (Cordarone) is a potassium channel blocker. Disopyramide (Norpace) is incorrect because it is a sodium channel blocker. Lidocaine (Xylocaine) is incorrect because it is a sodium channel blocker. Mexiletine (Mexitil) is incorrect because it is a sodium channel blocker.
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