Pharmacopsychiatry 2002; 35(3): 124-126
DOI: 10.1055/s-2002-31521
Case Report
© Georg Thieme Verlag Stuttgart · New York

Decrease of Energy Expenditure Causes Weight Increase in Olanzapine Treatment - A Case Study

M.  Virkkunen, K.  Wahlbeck, A.  Rissanen, H.  Naukkarinen, A.  Franssila-Kallunki
  • 1Department of Psychiatry, University of Helsinki, Helsinki, Finland
Further Information

Publication History

6. 3. 2001

12. 11. 2001

Publication Date:
23 May 2002 (online)

Preview

The aim of this study was to evaluate the mechanisms underlying weight gain induced by the atypical antipsychotic, olanzapine. We performed euglycemic, hyperinsulinemic clamp combined with indirect calorimetry on a 48-year-old male with antisocial personality disorder, alcohol dependence and paranoid ideation before and after one month of olanzapine (10 - 15 mg/day) therapy. The patient gave his informed, written consent for this study. The results were a weight gain of 6 kg and a decrease in both basal (from 1673 to 1613 kcal/24 h) and 3-hour (from 22.8 to 20.2 cal/kg fat free mass/min) energy expenditure. Serum thyroid hormone and high-density lipoprotein cholesterol levels decreased, and the triglyceride and low-density lipoprotein cholesterol levels increased. Insulin sensitivity did not change. We conclude that decreased basal energy expenditure may contribute to weight gain in olanzapine treatment.

References

Matti VirkkunenMD, PhD 

Department of Psychiatry, University of Helsinki

Lapinlahti Hospital

PO Box 320

00029 Huch

Finland

Phone: +358 (9) 47 18 12 60

Email: matti.virkkunen@huch.fi