Abstract
The new sulphonylurea CS 476 was tested for positive iontropic effect on the isolated cat papillary muscle. Unlike tolbutamide CS 476 had no positive inotropic effect. CS 476 had no adverse effect on blood pressure in dogs, cats and rats nor on the electrocardiogram of dogs in doses up to ten times the therapeutic dose. Unlike chlorpromide CS 476 did not potentiate the effect of exogenous antidiuretic hormone in hydrated dogs. In therapeutic concentrations the drug had no effect on smooth muscle preparations. 1,000-10,000 times therapeutic concentrations had a papaverine-like effect - similar to therapeutic concentrations of tolbutamide.
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