Patients with mild to moderate renal failure or mild hypercalciuria (presence of abnormally high levels of calcium in the urine) should be monitored carefully. Periodic checks of calcium levels and urinary calcium excretion should be made. Caution is required in patients receiving treatment for cardiovascular disease. Patients with rare hereditary problems such as fructose intolerance, glucose-galactose malabsorption or sucrase-isomaltase insufficiency should not take this medicine.