[Complications of association magnesium sulfate with nicardipine during preeclampsia: report of 2 cases].

The authors report a heart failure and a collapse following concurrently administration of nicardipine and magnesium sulfate. These two drugs have potential negative inotropic effect and decrease systemic vascular resistance. Magnesium sulfate is the first-line treatment for the prevention of primary and recurrent eclamptic seizures. Combination with calcium channel blockers should be used cautiously.