Antihypertensive Effect of Felodipine or Hydralazine When Added to β-Blocker Therapy

In a double-blind randomized study, hydralazine (n = 59) or the new dihydropyridine calcium antagonist felodipine (n = 61) was added to previous treatment with β-adrenoceptor blocking agents in a group of 120 patients with essential hypertension. Active treatment with either hydralazine or felodipin...

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