Effect of heparin administration on plasma binding of benzodiazepines.

PV Desmond, RK Roberts, AJ Wood, GD Dunn, GR Wilkinson, S. Schenker

Research output: Contribution to journalArticlepeer-review

37 Scopus citations


1 The effect of intravenous administration of 100 units of heparin on plasma of diazepam, chlordiazepoxide, oxazepam and lorazepam was examined in fourteen normal subjects and five patients with cirrhosis. 2 In normal non‐fasted subjects heparin caused a rapid 150–250% rise in the free fraction of diazepam, chlordiazepoxide and oxazepam but no change of lorazepam. The changes in free fraction were slightly smaller, but still significant, when the subjects were fasted. 3 These change in free fraction occurred within 90 s of administration of heparin and binding had returned to baseline by 30 to 45 min. 4 In the cirrhotic subjects the response to heparin was variable. 5 The use of heparin during drug disposition studies may affect the estimation of pharmacokinetic parameters and possibly pharmacological effects which are dependent on the circulating unbound drug level. 1980 The British Pharmacological Society

Original languageEnglish (US)
Pages (from-to)171-175
Number of pages5
JournalBritish Journal of Clinical Pharmacology
Issue number2
StatePublished - Feb 1980
Externally publishedYes

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)


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