What drug is a safe and effective calcium channel blocker only if the nurse administers them as sustained-release or extended-release preparations to treat hypertension?
A) Aliskiren (Tekturna)
B) Diltiazem (Cardizem)
C) Atenolol (Tenormin)
D) Metoprolol (Lopressor)
B
Feedback:
The calcium channel blockers available in immediate-release and sustained-release forms that are used in treating hypertension include amlodipine (Norvasc), felodipine (Plendil), isradipine (DynaCirc, DynaCirc CR), and nicardipine (Cardene, Cardene SR). Other calcium channel blockers are safe and effective for this use only if they are given as sustained-release or extended-release preparations. These include diltiazem (Cardizem, Dilacor CR), nifedipine (Procardia XL), nisoldipine (Sular), and verapamil (Calan SR). Aliskiren (Tekturna) is a renin inhibitor. Atenolol (Tenormin) and Metoprolol (Lopressor) are beta-blockers, not calcium channel blockers.
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