Ramelteon is a sleep agent that selectively binds to the MT1 and MT2 receptors in the suprachiasmatic nucleus (SCN), instead of binding to GABAA receptors.
It however does not appear to speed the onset of sleep or the amount of sleep a person gets. It is approved by the U.S. Food and Drug Adm inistration for long-term use.
Ramelteon does not show any appreciable binding to GABAA receptors, which are associated with anxiolytic, myorelaxant, and amnesic effects.

Used to cure insomnia.

Qingdao Sigma Chemical Co., Ltd.is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.

The aim of Qingdao Sigma Chemical Co., Ltd is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.

Qingdao Sigma Chemical Co., Ltd has become the "Top 500 Chinese manufacturing companies",

"Top 20 of global chemical sales".Qingdao Sigma Chemical Co., Ltdhas 21 subsidiaries and holding companies.