A multicenter study of verapamil in systemic hypertension in Thailand.

The antihypertensive effect and possible adverse effects of verapamil were assessed in 30 Thai patients with mild to moderate hypertension. All patients had normal blood chemistry evaluations and electrocardiograms. After a 4-week placebo period, 80 mg of verapamil was given 2 times a day for 8 weeks. Blood pressure and pulse rate were recorded both in supine and standing positions every 2 weeks. Verapamil decreased blood pressure significantly both in supine and standing positions. The pulse rate was not significantly affected. The most common adverse effect was constipation. No vivid dreams or breathlessness were reported. The blood chemistry and electrocardiograms at the end of the study period were not significantly changed. It is concluded that verapamil reduces blood pressure in mild to moderate hypertensive Thai patients.

RCT Entities:   Population Interventions Outcomes