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  • Title: Response of plasma renin-angiotensin system to a single captopril administration in patients receiving long-term treatment with captopril.
    Author: Iwata T, Dazai Y, Kitami Y, Muneta S, Imamura Y, Murakami E, Hiwada K.
    Journal: Clin Exp Pharmacol Physiol; 1992 Oct; 19(10):705-9. PubMed ID: 1424299.
    Abstract:
    1. The responses of angiotensin II (AII), AIII, aldosterone and plasma renin activity (PRA) to a single dose of captopril were investigated in hypertensive patients receiving long-term (more than 1 year) captopril therapy (CT patients) and compared with those of non-treated hypertensive patients (NT patients). 2. Baseline levels of AII and aldosterone were significantly lower in CT patients than in NT patients. AIII tended to be lower and PRA was slightly higher in CT than in NT patients, but these differences were not significant. 3. A single administration of captopril (50 mg orally) significantly decreased plasma levels of AII, AIII and aldosterone as well as blood pressure in both CT and NT patients. 4. These results demonstrate that chronically repeated administration of captopril to hypertensive patients effectively reduces the daily blood pressure and concomitantly the plasma AII level to acceptable levels in patients with no experience of ACE inhibition.
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