Effects of an angiotensin 2 receptor blocker plus diuretic combination drug in chronic heart failure complicated by hypertension

The effects of 24 weeks' treatment with an angiotensin 2 receptor blocker (ARB)/ diuretic combination drug were investigated in an open-label study of 61 patients with stabilized chronic heart failure. Renin-angiotensin-aldosterone system inhibitors were replaced with a tablet containing hydrochlorothiazide 6.25 mg plus candesartan 8 mg, administered orally, once daily, in patients with systolic blood pressure (SBP) ≥ 140 mmHg or diastolic blood pressure (DBP) ≥ 90 mmHg while under optimal treatment. Both SBP and DBP declined significantly during the ARB/diuretic combination treatment. Diuretics administered previously were discontinued during the study period in 15 patients, decreasing the number of drugs being taken. During ARB/diuretic combination treatment, the blood urea nitrogen level worsened but no significant changes were noted in potassium or estimated glomerular filtration rate, which had been a matter of concern. Additionally, the level of brain natriuretic peptide, an indicator of the severity of heart failure, was improved, indicating effectiveness and safety of the ARB/diuretic combination drug.