Quantitative analysis of the disopyramide concentration‐effect relationship.

British Journal of Clinical Pharmacology - Tập 9 Số 1 - Trang 67-75 - 1980
B. Whiting1,2, Nicholas H. G. Holford1,2, LB Sheiner1,2
1Department of Materia Medica, University of Glasgow, Stobhill General Hospital, Glasgow G21 3UW, Scotland
2Division of Clinical Pharmacology, Departments of Medicine and Laboratory Medicine, University of California, San Francisco, California 94143, USA

Tóm tắt

1. A combined pharmacokinetic‐pharmacodynamic model has been used to analyse the relationship between QT prolongation and changes in plasma concentration which occurred after disopyramide was given intravenously and orally to eight healthy subjects. 2. The pharmacokinetic models appropriate to intravenous and oral disopyramide have been extended by an ‘effect compartment’ which has no influence on the predetermined mass of drug in the body. 3. The model incorporates an adjustment for lag of effect behind any rapid changes in plasma concentration such as occur in the early distributive phase following intravenous administration. This permits calculation of the proportionality constant relating plasma concentration to effect. 4. Irrespective of the route of administration the mean (+/‐ s.d.) prolongation of the QT interval was 14.5 +/‐ 6.5 ms/micrograms ml‐1. 5. There was no evidence that metabolite produced during first pass after oral administration made any significant contribution to effect. 6. This modelling technique should be applicable to the study of the concentration‐effect relationship of a number of other drugs, both in health and in disease.

Từ khóa


Tài liệu tham khảo

10.1111/j.1365-2125.1978.tb04605.x

10.1002/cpt1976203278

HINDERLING P.H., 1976, Pharmacokinetics of the antiarrhythmic disopyramide in healthy humans, J. Pharmacokin. Biopharm., 4, 199, 10.1007/BF01063614

10.1007/BF01063615

NETER J., 1974, Applied linear statistical models, 87

10.1002/cpt1979253358

Thông tin
Thông tin xuất bản

British Journal of Clinical Pharmacology

Tập 9 Số 1

67-75

Thông tin tác giả