Pharmacokinetic interaction between diltiazem and nortriptyline.

Abstract:

OBJECTIVE:Case report of a pharmacokinetic interaction between diltiazem and nortriptyline. METHODS:Determination of plasma nortriptyline concentrations by HPLC. Calculation of nortriptyline clearances and half-life by formulae used routinely in therapeutic drug monitoring. RESULTS:The average plasma concentration of nortriptyline at steady state (Css) divided by the amount of nortriptyline administered per time rose significantly in a patient with concomitant administration of diltiazem, suggesting increased bioavailability and/or decreased clearance of nortriptyline. CONCLUSIONS:There is a significant pharmacokinetic interaction between diltiazem and nortriptyline, which is probably due to a reduction in the first pass clearance of nortriptyline, leading to an increase in its bioavailability.

journal_name

Eur J Clin Pharmacol

authors

Krähenbühl S,Smith-Gamble V,Hoppel CL

doi

10.1007/BF00203789

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

417-9

issue

5

eissn

0031-6970

issn

1432-1041

journal_volume

49

pub_type

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