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Melatonin Plays a Role in Reducing Pain Sensitivity

  [ 39 votes ]   [ 1 Comment ] • December 7, 2012

Melatonin Plays a Role in Reducing Pain SensitivityArticle:

Melatonin in antinociception: its therapeutic applications. 
– Source: Current Neuropharmacology, June 2012.

By V. Srinivasan, et al.


The intensity of pain sensation exhibits marked day and night variations. Since the intensity of pain perception is low during dark hours of the night when melatonin levels are high, this hormone has been implicated as one of the prime antinociceptive [reducing sensitivity to painful stimuli] substances.

A number of studies have examined the antinociceptive role of melatonin in acute, inflammatory and neuropathic pain animal models.

  • It has been demonstrated that melatonin exerts antinociceptive actions by acting at both spinal cord and supraspinal levels.

  • The mechanism of antinociceptive actions of melatonin involves opioid, benzodiazepine, a(1)- and a(2)-adrenergic, serotonergic and cholinergic receptors.

  • Most importantly however, the involvement of MT(1)/MT(2) melatonergic receptors in the spinal cord has been well documented as an antinociceptive mechanism in a number of animal models of pain perception.

  • Exogenous melatonin [melatonin produced outside the body; i.e., in supplement form] has been used effectively in the management of pain in medical conditions such as fibromyalgia, irritable bowel syndrome and migraine and cluster headache.

  • Melatonin has been tried during surgical operating conditions and has been shown to enhance both preoperative and post-operative analgesia.

The present review discusses the available evidence indicating that melatonin, acting through MT(1)/MT(2) melatonin receptors, plays an important role in the pathophysiological mechanism of pain.

Source: Current Neuropharmacology, June 2012. By V. Srinivasan, E.C. Lauterbach, K.Y. Ho, D. Acuna-Castroviejo, R. Zakaria, A. Brzezinski. Sri Sathya Sai Medical Educational and Research Foundation, Medical Sciences Research Study Center, Prasanthi Nilayam, 40 Kovai Thirunagar, Coimbatore-641014, Tamilnadu, India.


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Article Comments Post a Comment

Posted by: IanH
Dec 8, 2012
The dose of melatonin required for antinociception (painreducingg) is 10mg to 30mg. Some studies have used more than this. Any dosage lower than this has not been shown to be effective. It takes a while to get used to the slight somnolence induced by this dose.

To review this look up the Journal Of Pineal Research. Some of the papers are free to view.
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