The metabolic clearance rate of dehydroisoandrosterone sulfate. III. The effect of thiazide diuretics in normal and future pre-eclamptic pregnancies. The present study reports that the metabolic clearance rate of dehydroisoandrosterone sulfate (MCRDS) is decreased by thiazide diuretics during normal and future pre-eclamptic pregnancies. This observation supports the thesis that diuretics represent a potential hazard to the fetus by decreasing placental perfusion.