European Journal of Clinical Pharmacology

, Volume 32, Issue 1, pp 53–60

A comparative study of the pharmacokinetics and pharmacodynamics of atenolol, hydrochlorothiazide and amiloride in normal young and elderly subjects and elderly hypertensive patients

  • K. Sabanathan
  • C. M. Castleden
  • H. K. Adam
  • J. Ryan
  • T. J. Fitzsimons
Originals

DOI: 10.1007/BF00609957

Cite this article as:
Sabanathan, K., Castleden, C.M., Adam, H.K. et al. Eur J Clin Pharmacol (1987) 32: 53. doi:10.1007/BF00609957

Summary

Six normal young and six normal elderly volunteers and six elderly hypertensive patients took part in an acute and chronic dose study of a combination capsule containing atenolol (50 mg), hydrochlorothiazide (25 mg) and amiloride (2.5 mg) designed for the treatment of hypertension. No difference in any of the drug pharmacokinetic parameters could be detected between the hypertensives and the normal elderly subjects. The bio-availability and the 24-h blood concentrations of all three drugs, half-life of atenolol and amiloride and the peak concentration of hydrochlorothiazide was significantly greater in the elderly. The 24-h blood concentrations of atenolol and hydrochlorothiazide did not alter with chronic dosing, but amiloride concentrations were significantly higher at this time in all groups. A significant fall in the blood pressure was observed in the hypertensive group. Heart rate fell more in the normal and hypertensive elderly subjects than in the young. The combination has shown to be an effective and well tolerated antihypertensive in the elderly patient with a 24-h duration of action.

Key words

atenololamiloridehydrochlorothiazideyoungelderlypharmacokineticspharmacodynamicsvolunteerspatientshypertension

Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • K. Sabanathan
    • 1
  • C. M. Castleden
    • 2
  • H. K. Adam
    • 3
  • J. Ryan
    • 3
  • T. J. Fitzsimons
    • 3
  1. 1.Consultant GeriatricianWest Norwich HospitalNorwichU.K.
  2. 2.Consultant GeriatricianLeicester General HospitalLeicesterU.K.
  3. 3.ICI Pharmaceuticals PlcMacclesfieldU.K.