Clinical and biological evaluation of dilevalol vasodilating properties in mild to moderate hypertension.
Dilevalol is a vasodilating beta-blocker with proven antihypertensive activity. In this study, 28 patients with mild-to-moderate uncomplicated hypertension underwent 2 submaximal exercise tests, each consisting of progressive steps of 20 watts for 2 minutes or up to 85% theoretical maximum heart rate. Five minutes after the first test, patients received either placebo or dilevalol 200 mg, 400 mg or 600 mg. The second exercise test was performed 3 hours later. Diastolic blood pressure, systolic blood pressure, heart rate and norepinephrine plasma levels were assessed before and after exercise. Dilevalol at all doses caused a significant decrease in heart rate and blood pressure both at rest and during exercise, compared to placebo. Dilevalol 600 mg had a greater effect on diastolic blood pressure than dilevalol 200 mg and 400 mg. Administration of dilevalol 200 mg and 400 mg enabled 42% of patients to increase their maximal exercise level by 20 to 60 watts. Dilevalol increased plasma norepinephrine levels at the 100 watts exercise levels from 5.1 +/- 4.0 nmol/l to 7.6 +/- 4.3 nmol/l (p less than 0.05). No adverse effects were observed during dilevalol treatment. This study shows that dilevalol is an effective antihypertensive agent that blunts heart rate and blood pressure risings during exercise.
Drici
M D
MD
Department of Pharmacology, Faculty of Medicine, Nice, France.
Candito
M
M
Ferrari
E
E
Jacomet
Y
Y
Morand
P
P
Lapalus
P
P
D000284:Administration, Oral; D000328:Adult; D001794:Blood Pressure / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D004341:Drug Evaluation; D005080:Exercise Test; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006439:Hemodynamics / Q000187:drug effects*; D006801:Humans; D006973:Hypertension / Q000097:blood / Q000188:drug therapy* / Q000503:physiopathology; D007741:Labetalol / Q000008:administration & dosage / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009638:Norepinephrine / Q000097:blood; D014665:Vasodilator Agents / Q000008:administration & dosage / Q000627:therapeutic use*
D014665:Vasodilator Agents; D007741:Labetalol; D009638:Norepinephrine