Verapamil and gynipral administered to pregnant rats in doses on a clinical level suppress the uterine contractions, which is manifested by a decrease in the amplitude and frequency of the biopotential. The joint administration of gynipral and verapamil (in half doses) resulted in a pronounced tocolytic effect.
Laboratory of Pharmacology, Ott Institute of Obstetrics and Gynecology, Russian Academy of Medical Sciences, Mendeleevskaya Liniya 3, St. Petersburg, 199034 Russia.