Not to be given in patients w/ cholestasis, biliary obstructive disorders or severe hepatic impairment. Increased risk of severe hypotension & renal insufficiency in patients w/ bilateral renal artery stenosis or stenosis of the artery to a single functioning kidney. Periodic monitoring of K & creatinine serum levels in patients w/ impaired renal function. Intravascular hypovolaemia. Increased risk of hypotension, hyperkalaemia & decreased renal function (including acute renal failure). Frequent close monitoring of renal function, electrolytes & BP if dual blockade therapy is considered & necessary. Patients w/ CHF or underlying renal disease including renal artery stenosis. Primary aldosteronism. Patients suffering from aortic or mitral stenosis or obstructive hypertrophic cardiomyopathy. Hypoglycaemia. Hyperkalaemia. Black hypertensive patients. Excessive reduction of BP in patients w/ ischemic cardiopathy or CV disease. Concomitant use w/ salt substitutes containing K, K-sparing diuretics, ACE inhibitors, AIIA, NSAIDs (including selective COX-2 inhibitors), heparin, immunosuppressives (cyclosporin or tacrolimus), & trimethoprim. May affect ability to drive or operating machinery. Not to be initiated during pregnancy. Not recommended during breast-feeding.