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  • Title: The bedtime administration ameliorates blood pressure variability and reduces urinary albumin excretion in amlodipine-olmesartan combination therapy.
    Author: Hoshino A, Nakamura T, Matsubara H.
    Journal: Clin Exp Hypertens; 2010; 32(7):416-22. PubMed ID: 20828223.
    Abstract:
    Chronotherapy has the potential to improve blood pressure (BP) variability and to decrease stroke and cardiovascular events. The present study examined the efficacy and safety of the bedtime administration in amlodipine-olmesartan combination therapy, as compared with the morning administration. The present study was an open-label, randomized crossover study of the effects of the morning vs. bedtime administration of amlodipine-olmesartan combination. The subject was 31 essential hypertensive patients. Morning BP surge (MBPS) and nocturnal BP pattern were analyzed from ambulatory BP data. Glucose and lipid profiles and cardiovascular-renal data were also collected. The bedtime administration reduced MBPS significantly (24.2 ± 13.5 mmHg vs. 32.3 ± 14.2 mmHg, p < 0.001) with no excessive nocturnal BP fall. In nondipper, the bedtime administration significantly improved nocturnal BP. On the other hand, it did not reduce nocturnal BP in dipper. Urinary albumin/creatinine ratio was lower in the bedtime administration than in the morning administration (42.5 ± 59.9 mg/g vs. 75.3 ± 26.4 mg/g, p = 0.044). In amlodipine-olmesartan combination therapy, the bedtime administration reduced better MBPS with correcting nocturnal BP fall and improved urinary albumin excretion. The bedtime dosing of amlodipine and olmesartan seems more apt than the morning dose to obtain the therapeutic goal.
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