title: Effect of oral pyridoxine hydrochloride supplementation on arterial blood pressure in patients with essential hypertension.
abstract: The purpose of this study was to test the effect of vitamin B6 (pyridoxine-HCl, CAS 58-56-0) supplementation on arterial blood pressure in essential hypertension. The trial comprised 9 normotensive subjects (7 men and 2 women, aged between 32-58 years; mean +/- SD, 48 +/- 11) and 20 patients with essential hypertension (16 men and 4 women, aged between 32-69 years; mean +/- SD, 56 +/- 12). The patients were treated during 4 weeks with a single oral dose of pyridoxine (5 mg/kg body weight/day). After a 5-min rest, measurements were made in the supine position. When compared with the normotensive subjects, the hypertensive subject group had a significantly higher systolic and diastolic blood pressure (p < 0.001) and higher level of plasma norepinephrine (NE) (p < 0.01) before pyridoxine treatment. On the other hand, there were no significant differences in plasma epinephrine (E) and heart rates. Treatment of hypertensive patients with pyridoxine significantly reduced systolic (p < 0.01) and diastolic blood pressure (p < 0.005), plasma NE (p < 0.005) and E (p < 0.05) within 4 weeks. However, there was no significant difference in heart rate at the end of pyridoxine treatment. These results indicate a relationship between pyridoxine status and arterial blood pressure in the essential hypertensive patients.
authors.affiliation: Department of Physiology, Faculty of Medicine, University of Dicle, Diyarbakir, Turkey.
authors.forename: M
authors.initials: M
authors.lastname: Aybak
authors.forename: A
authors.initials: A
authors.lastname: Sermet
authors.forename: M O
authors.initials: MO
authors.lastname: Ayyildiz
authors.forename: A Z
authors.initials: AZ
authors.lastname: Karakilçik
mesh_terms: D000328:Adult; D000368:Aged; D000959:Antihypertensive Agents / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D001794:Blood Pressure / Q000187:drug effects*; D004837:Epinephrine / Q000097:blood; D005260:Female; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D006973:Hypertension / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009638:Norepinephrine / Q000097:blood; D011736:Pyridoxine / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use
chemical_list: D000959:Antihypertensive Agents; D011736:Pyridoxine; D009638:Norepinephrine; D004837:Epinephrine