What are the mechanisms of action of melatonin receptor agonists for insomnia?

Updated: Sep 11, 2018
  • Author: Jasvinder Chawla, MD, MBA; Chief Editor: Selim R Benbadis, MD  more...
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Melatonin is a hormone produced by the pineal gland during the period of sundown to sunrise. It exerts sleep-promoting effects through MT1/MT2 receptors via an unknown mechanism. Ramelteon is an agonist at MT1 and MT2 receptors that is approved by the US Food and Drug Administration (FDA) for the treatment of sleep-onset difficulty. [24]

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