The antihypertensive action of isradipine in mild essential hypertension.

The antihypertensive effect of isradipine compared with placebo was assessed in 28 male patients (aged 40-64 years) with mild-to-moderate essential hypertension. After withdrawal of all previous antihypertensive treatment, these patients were entered into a 4-week placebo period followed by randomization to receive double-blind, for 8 weeks, either placebo (n = 14) or isradipine at 1.25-2.