Pharmacokinetics and blood pressure effects of felodipine in elderly hypertensive patients. A comparison with young healthy subjects.

Abstract:

:The pharmacokinetics and antihypertensive effects of felodipine, a new dihydropyridine calcium channel blocker, were studied in elderly hypertensive patients, 67 to 79 years of age and in young healthy subjects, 20 to 34 years of age following oral administration of 5 mg twice daily to steady-state. A single intravenous dose of 3H-felodipine (0.04mg) was given together with the oral dose on the study day. Cmax (17 nmol/L), Cmin (5 nmol/L) and AUC (82 nmol/L.h) were 3 times higher in the elderly than in the young subjects. Systemic availability was about 15% in both groups. Plasma clearance (CL) was reduced from 56.1 L/h in the young to 25.4 L/h in the elderly. There was no effect of age on the volume of distribution at steady-state (Vss). Reduced hepatic blood flow and enzyme activity or increased gut wall metabolism are possible reasons for the altered pharmacokinetics in the elderly. Blood pressure was reduced in the elderly from 190/99 to 177/91 mm Hg 12 hours after 5mg felodipine during twice daily dosage. The effect on blood pressure correlated with plasma concentrations of felodipine.

journal_name

Clin Pharmacokinet

authors

Landahl S,Edgar B,Gabrielsson M,Larsson M,Lernfelt B,Lundborg P,Regårdh CG

doi

10.2165/00003088-198814060-00004

subject

Has Abstract

pub_date

1988-06-01 00:00:00

pages

374-83

issue

6

eissn

0312-5963

issn

1179-1926

journal_volume

14

pub_type

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