Correct intravascular vol- or Na-depletion prior to administration. Increased risk of severe hypotension in patients w/ bilateral renal artery stenosis. Periodic monitoring of K & serum creatinine in patients w/ renal impairment. Monitoring of serum K in patients, suffering from heart failure. Patients w/ recent kidney transplantation, primary aldosteronism, aortic or mitral stenosis, obstructive hypertrophic cardiomyopathy, ischemic cardiopathy or ischemic CV disease. Patients w/ rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption. Lactation. Childn.