Resumen

TELLEZ-MENDEZ, R et al. Magnitud, velocidad y eficacia antihipertensiva de la Nifedipina de liberación programada en microgránulos en el tratamiento de pacientes con hipertensión arterial esencial. AVFT [online]. 2004, vol.23, n.1, pp.67-73. ISSN 0798-0264.

The magnitude, velocity and antihypertensive effectiveness of the nifedipine liberation programmed in microgranules (NLPM) was evaluated in patients with moderate to severe hypertension. A total of one hundred and thirty five patients were evaluated during six weeks in a prospective, open, comparative and crossed study. Of that group, 25.9% (n = 35) were normal patients, the remainder of them were hypertensive patients, 40% (n = 54 patients) received 30 mgrs (8am or 8pm) of NLPM and 20.7% (n = 28 patients) received 60 mgrs (8am or 8pm) of NLPM, 13.3% of the admitted patients (n = 18) were considered as failures of the medication. Both doses at different schedules of the taking diminished the arterial pressures significantly (p <0.05). There were patients that reached the end point a 30 mgrs dose, this achievement was obtained from the 3^rd week of medication keeping on these pressure levels until the end of the study, being the highest magnitude of reduction were: 8am PAS 15.5 mmHg (12.2%), PAD 12 mmHg (12.6%), PAM 12.2 mmHg (10.9%) and 8pm of: PAS 14.1 mmHg (9.7%), PAD 9.5 mmHg (10.6%) and PAM 11.2 mmHg (10.05%), on the other hand, in those who achieved the end point with the administration of 60 mgrs, reductions were observed from the 3^rd week obtaining the maximum effect at the 6^th week being the highest magnitude of reduction of: 8am PAS 26.3 mmHg (16.34%), PAD 18.5 mmHg (17.69%) and PAM 20.9 mmHg (17.0%) and 8pm PAS 22.5 mmHg (15.15%), PAD 18 mmHg (18.1%) and PAM 21.8 mmHg (18.5%). The magnitude of the antihypertensive response of the NLPM was numerically bigger with 60 mgrs than with 30 mgrs, but the response velocity was bigger with 30 mgrs maybe because the blood pressure at the beginning of the study were bigger in that group that required 60 mgrs, (p <0.05) arriving at the end of the study (6th week) to normal pressure figure, similar in both groups (p> 0.05). The heart rate in the group of 30 mgrs (8am and 8pm) showed a significant decrease after the treatment (p <0.05), on the other hand in the group of 60 mgrs these stayed unaffected (p> 0.05). In conclusion NLPM demonstrated to be effective for the managing of patients with light to moderate hypertension, obtaining a bigger magnitude in the blood pressure effect with a dose of 60 mgrs than with a dose 30 mgrs, however, with this last dose, the antihypertensive response was more fast.

Palabras clave : Antihypertensive therapy evaluation; Nifedipine.