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Related Experiment Videos

Antidepressants and pain.

Juan A Micó1, Denis Ardid, Esther Berrocoso

  • 1Pharmacology and Neuroscience Research Group, Department of Neuroscience (Pharmacology and Psychiatry), School of Medicine, University of Cádiz, Plaza Fragela 9, 11003 Cádiz, Spain. juanantonio.mico@uca.es

Trends in Pharmacological Sciences
|June 10, 2006
PubMed
Summary

Tricyclic antidepressants offer genuine pain relief for neuropathic pain, acting independently of their antidepressant effects. Further research into these pain-relieving mechanisms could lead to new drug development.

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Area of Science:

  • Pharmacology
  • Neurology
  • Pain Management

Background:

  • Tricyclic antidepressants and anticonvulsants are primary treatments for neuropathic pain.
  • Antidepressants demonstrate analgesic properties in chronic pain patients, irrespective of depression.
  • The analgesic and antidepressant effects of these drugs appear to be independent.

Purpose of the Study:

  • To explore the mechanisms underlying the analgesic effects of tricyclic antidepressants in neuropathic pain.
  • To investigate the potential for shared biochemical pathways between pain and depression.

Main Methods:

  • Review of existing pharmacological data and mechanistic studies.
  • Consideration of evidence from knockout-mouse studies.
  • Analysis of the relationship between chronic pain and depression.

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Main Results:

  • Antidepressants possess genuine analgesic effects, distinct from their antidepressant actions.
  • Analgesia is mediated centrally, with evidence also suggesting peripheral mechanisms.
  • Inhibition of monoamine transporters, enhancing descending pain inhibition, is a key mechanism.

Conclusions:

  • Tricyclic antidepressants have a validated analgesic effect for neuropathic pain.
  • Understanding their mechanisms can guide the development of novel pain therapeutics.
  • Shared biochemical pathways may exist between chronic pain and depression.