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Researchers say they have found the trigger for insomnia

For insomniacs, those sleepless nights may soon be over.

Researchers in the United States say they have found the chemical trigger that causes people to wake up.

They say they hope to use this knowledge to produce restful sleep.

The study’s lead author said blocking the specific enzyme caused both REM and non-REM stages of sleep.

He hopes his research will lead to a treatment for insomnia that is not accompanied by the usual side effects.