Efficacy of captopril and nifedipine in black and white patients with hypertensive crisis

• Type: Article in International Scientific Journal
• Date: 1997

Authors

Damasceno, A (Author) Other; Ferreira, B (Author) Other; Patel, S (Author) Other; Sevene, E (Author) Other; Polonia, J (Author) FMUP

Journal

Title: Journal of Human Hypertension

Vol. 11

Pages: 471-476

ISSN: 0950-9240

Publisher: Springer Nature

Indexing

ISI Web of Knowledge

Scopus - 14 Citations

Other information

Authenticus ID: P-007-7DA

DOI: 10.1038/sj.jhh.1000428

Abstract (EN): We examined the antihypertensive efficacy of: (1) sublingual-oral single doses of captopril (25 mg) and nifedipine-capsules (10 mg) in 9 + 9 white patients and in 9 + 8 black patients with hypertensive crisis; and (2) a single oral dose of the slow-acting preparation of nifedipine-retard (20 mg) in another 10 black patients. Blood pressure (BP) was assessed at 10 min intervals for 6 h after administration. After 6 h, the BP falls induced by these drugs were still significantly lower than the baseline placebo values. Hypotensive effect of nifedipine-capsules was established more rapidly than that of captopril in both white and black patients, and of nifedipine-retard in black patients. Considering the area under the curve of BP values during the 6-h treatment, the overall hypotensive effect of nifedipine-capsules was similar to captopril in white patients, but significantly more pronounced than captopril and nifedipine-retard in black patients. In white patients similar maximal drops of BP (mean ± s.e.m.) were obtained with nifedipine-capsules (71 ± 4/52 ± 4 mmHg) and with captopril (69 ± 4/50 ± 3 mmHg). In black patients the maximal drop of BP of nifedipine-capsules (70 ± 4/52 ± 4 mmHg) was greater (P < 0.02) than that of captopril (48 ± 4/32 ± 3 mmHg) but similar to that of nifedipine-retard (71 ± 4/49 ± 4 mmHg). However, in contrast to nifedipine-capsules and captopril, nifedipine-retard produced a slower drop in BP. The time of peak drop in BP of both nifedipine-capsules and captopril occurred within the first 2 h whereas with nifedipine-retard it occurred only between 4 and 6 h after administration. Fewer patients reported side effects with nifedipine-retard as compared with the other two preparations. We conclude that single doses of captopril and nifedipine reduces BP for at least 6 h in both white and black patients with hypertensive crisis, but nifedipine is more potent than captopril in black patients. The slow release form of nifedipine-retard effectively and safely lowers BP while achieving a rapid enough effect without the critical rapid falls in BP that occur with nifedipine-capsules.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6