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  • Title: Antihypertensive and hormonal effects of single oral doses of captopril and nifedipine in essential hypertension.
    Author: Soto ME, Thibonnier M, Sire O, Menard J, Corvol P, Milliez P.
    Journal: Eur J Clin Pharmacol; 1981; 20(3):157-61. PubMed ID: 7026255.
    Abstract:
    In a single-dose crossover study Captopril (SQ 14225), 1 mg/kg body weight, and Nifedipine (Bay a 1040) 20 mg were administered orally to 12 hospitalized patients with essential hypertension (Stage 1 or 2, W.H.O.). Both drugs significantly reduced blood pressure, but each dose acted differently: the mean maximum arterial pressure reduction was faster and greater with Nifedipine than with Captopril: -23 +/- 2% at 37 +/- 15 min and -17 +/- 1% at 86 +/- 25 min, respectively. Captopril inhibited angiotensin II and aldosterone production, but did not accelerate heart rate or stimulate vasopressin release. Nifedipine stimulated vasopressin release and increased heart rate, but the renin angiotensin aldosterone system was not significantly affected. The blood pressure reduction was related to the initial level of activation of the renin angiotensin system only for Captopril. The blood pressure reduction induced by one drug was not related to that produced by the other in the same patient.
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