Special Article

Duloxetine Does Not Relieve Painful Physical Symptoms in Depression: A Meta-Analysis
Glen I. Spielmans

Department of Psychology, Metropolitan State University, Saint Paul, Minn., USA

Address of Corresponding Author

Psychother Psychosom 2008;77:12-16 (DOI: 10.1159/000110055)

  Key Words

• Duloxetine, analgesic properties
• Painful physical symptoms
• Depression
• Advertising
• Data reporting

  Abstract

Background:Duloxetine inhibits both serotonin and norepinephrine reuptake and is marketed as a treatment for both the core emotional symptoms and painful physical complaints that often accompany depression. Some studies have found that duloxetine is efficacious in treating painful symptoms associated with depression but these findings have been inconsistent. Several narrative review articles have reached positive conclusions about the efficacy of duloxetine as an analgesic in depression but there has been no quantitative systematic review regarding the impact of duloxetine on pain among this population. A meta-analysis of data pertaining to duloxetine's purported analgesic effects on depressed patients was thus undertaken. Methods:Studies were selected through searching Medline and Cochrane Trial databases as well as examining Lilly's public clinical trial database. A random effects model was used. Results: Across five trials, the results indicate a very small (d = 0.115) and statistically nonsignificant (p = 0.057) analgesic effect for duloxetine. Additionally, some of the relevant data on duloxetine's effects have not been reported fully, making it likely that the obtained results reflect an overestimate of its true impact on painful physical symptoms in depression. Discussion:The current analysis is based on a small number of studies; further trials may yield significant results favoring duloxetine. Based upon the currently available evidence, the marketing of duloxetine as an antidepressant with analgesic properties for people with depression does not appear to be adequately supported.

Copyright © 2008 S. Karger AG, Basel

  Author Contacts

Glen Spielmans, PhD
Department of Psychology
Metropolitan State University, 1450 Energy Park Drive
Saint Paul, MN 55108 (USA)
Tel. +1 651 999 5826, Fax +1 651 999 5822, E-Mail glen.spielmans@metrostate.edu

  Article Information

The author has minor holdings (less than 10,000 USD) in a mutual fund, Vanguard Health Care, which invests nearly exclusively in pharmaceutical companies. As of December 31, 2006, 4.81% of the fund's assets were in Lilly, the manufacturer of duloxetine.

Published online: December 14, 2007
Number of Print Pages : 5
Number of Figures : 0, Number of Tables : 1, Number of References : 39