6. Which of the following therapies is not indicated in patients with angina from coronary vasospasm?

A. Dihydropyridine calcium channel blockers (amlodipine, nifedipine)

B. Non-dihydropyridine calcium channel blockers (diltiazem, verapamil)

C. Beta-blockers (atenolol, metoprolol)

D. Long acting nitrates (isosorbide mononitrate, isosorbide dinitrate)

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