Metoclopramide enhances labetalol-induced antihypertensive effect during handgrip in hypertensive patients / La metoclopramide y el labetalol producen efectos antihipertensivos durante el manejo en pacientes hipertensivos

ABSTRACT

The effects of metoclopramide, labetalol and metoclopramide plus labetalol treatment on baseline cardiovascular parameters and isometric handgrip induced changes, were evaluated in eleven hypertensive subjects. Although all treatments were effective in reducing resting systolic (SBP) and diastolic (DBP) blood pressures, the combination of metoclopramide and labetalol appeared to provide a greater decrease (changes in SBP/DBP 15/11 mmHg, p<0.05; from 149 + 4/95 +4 mmHg to 134 + 5/84 ñ 3 mmHg) than did labetalol alone (changes in SBP/DBP 10/9 mmHg p<0.05; from 149 ñ 4/95 ñ 4 to 139 ñ 486 ñ 3 mmHg). At 2 minutes, handgrip increased blood pressure on placebo (changes in SBP/DBP 34/7 mmHg, p<0.001). However, in the presence of metoclopramide and metoclopramide plus labetalol, handdrip induced lesser increases in blood pressure (changes in SBP/DBP 23/7 mmHg, p<0.01 and 18/4 mmHg, p<0.01, for metoclopramide and metoclopramide plus labetalol treatment, respectively. We conclude that 1.- Metoclopramide lowers blood in hypertensive patients; 2.- Metoclopramide attenuates blood pressure response to isometric handgrip and; 3.- Both compouds, labetalol and metoclopramide, seem to have a pharmacological interaction conceming blood pressure decrease. It is suggested a clinical significance for the metoclopramide effect