Calcium Antagonists Inhibit the Motility of Washed Human Spermatozoa*

Abstract
The effect of three clinically well-known calcium antagonists (nifedipine, verapamil and diltiazem) on the motility of washed human spermatozoa was investigated by Laser Doppler spectroscopy. In contrary to other investigations, a motility and velocity inhibiting influence of all three substances, especially of nifedipine, was observed.