A comparison of the effects of oxodipine and nifedipine on rat vas deferens

Abstract

The effects of oxodipine, a new dihydropyridine, were studied and compared with those of nifedipine in the complete vasa deferentia and in the prostatic and epididymal halves of the rat vas deferens. Oxodipine and nifedipine, 10(-9) -10(-6)M, produced a dose-dependent inhibition of the contractile responses induced by single pulse stimulation, noradrenaline (3 x 10(-5)M) and high-K (50 mM). The inhibitory effects of oxodipine were significantly reduced in high Ca media. From these experiments it is concluded that oxodipine, like nifedipine, produced a similar and potent inhibitory effect of the contractile responses induced in the rat vas deferens.