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Abstract
We compared treatment with an angiotensin II receptor antagonist (ARB) and a calcium channel blocker (CCB) combination and a fixed-dose ARB and thiazide diuretic in 18 chronic kidney disease (CKD) patients. A randomized crossover study was performed using a fixed-dose combination of losartan-hydrochlorothiazide or losartan combined with controlled-release nifedipine. Both systolic blood pressure (SBP) and diastolic blood pressures (DBPs) were lower during the nifedipine period than during the diuretic period. No significant difference was observed in urinary albumin excretion, but the estimated glomerular filtration rate was higher in the nifedipine than in the diuretic period. Serum uric acid and low-density lipoprotein cholesterol were higher in the diuretic than in the nifedipine period. A significantly low cardio-ankle vascular index, an index of arterial wall stiffness, was observed in the nifedipine period. A combination of ARB and a controlled-release nifedipine at 20–40 mg used showed a superior antihypertensive effect in CKD patients compared to a fixed-dose combination of losartan 50 mg-hydrochlorothiazide 12.5 mg in terms of blood control. The former combination is considered advantageous for maintaining renal function and artery wall elasticity without influencing uric acid or lipid metabolism.