[Crossed double-blind multicentric studies of the effect of verapamil in patients with angina pectoris].

The anti-angina effect of Verapamil was investigated during a multicentric study carried out with the crossed, double blind technique. The drug was administered in a dose of 240 mg per day per os. During the period of treatment with Verapamil, particularly significant effects in the number of angina attacks, the consumption of nitroglycerin and tolerance of effort were observed.