European Journal of Clinical Pharmacology

, Volume 18, Issue 2, pp 165–169 | Cite as

Wide variation in serum chlorpropamide concentration in outpatients

  • U. Bergman
  • I. Christenson
  • B. Jansson
  • B. -E. Wiholm
  • J. Östman


Serum chlorpropamide concentrations (s-CPA) were determined and related to clinical findings in 83 outpatients with maturity onset diabetes. The daily doses of CPA (mg/kg) varied six-fold, but s-CPA ranged 18-fold between the patients. There was a significant correlation between dose and s-CPA (r=0.61), which rose to 0.75 in the 30 patients who had prescribed no other drugs. Patients given other drugs concomitantly were over-represented amongst subjects with extreme values of apparent plasma clearance of CPA. There was no correlation either between serum creatinine or age and s-CPA. Of the 83 patients 40 (48%) had acceptable blood and urinary glucose values according to our criteria; but as 17 were overweight, only 23 patients (28%) had acceptable clinical control. Of the remaining 60 patients, too low a dose was being given to only 12, and dietary failure was the most probable explanation in the others. Thirteen patients (16%) probably did not need CPA. It is likely that this is a partial explanation for the high utilisation of oral antidiabetic drugs in Sweden. There was no general correlation between dose or s-CPA and blood glucose values, but analysis of s-CPA may still be of value in explaining unexpected changes in clinical control.

Key words

chlorpropamide diabetes drug utilisation patient compliance diet plasma concentration maturity onset diabetes 


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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • U. Bergman
    • 1
  • I. Christenson
    • 3
  • B. Jansson
    • 3
  • B. -E. Wiholm
    • 1
    • 2
  • J. Östman
    • 2
  1. 1.Departments of Clinical PharmacologyHuddinge University HospitalHuddingeSweden
  2. 2.Internal Medicine, Karolinska InstitutetHuddinge University HospitalHuddingeSweden
  3. 3.Department of PharmacyHuddinge University HospitalHuddingeSweden

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