70 Take special care with Imprida − if you have been sick (vomiting or diarrhoea). − if you are taking diuretics (a type of medicine also called “ water tablets” which increases the amount of urine you produce). − if you are taking other medicines or substances that increase the level of potassium in your blood (e. g. some types of diuretics, potassium supplements or salt substitutes containing potassium). − if you have liver or kidney problems. − if you have a condition affecting the renal glands called “ primary hyperaldosteronism”. − if you have had heart failure. − if your doctor has told you that you have a narrowing of the valves in your heart (called “ aortic or mitral stenosis”) or that the thickness of your heart muscle is abnormally increased (called “ obstructive hypertrophic cardiomyopathy”).