Nifedipine enhances the cardiac toxicity of magnesium sulfate in the isolated perfused Sprague-Dawley rat heart.

Thorp, J M; Spielman, F J; Valea, F A; Payne, F G; Mueller, R A; Cefalo, R C · Am J Obstet Gynecol · 1990

basic_science · Level V

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Abstract

Magnesium sulfate is commonly used in tocolytic regimens and as prophylaxis against seizures. Nifedipine may be used simultaneously in either situation. With the isolated perfused rat heart model (Sprague-Dawley rats), we investigated the effects of these agents on cardiac function. Whereas each agent alone depressed cardiac performance, the two drugs together had maximal depressive effects on the heart.

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