Contact Us:https://bloghub.in.net/view_article.php?id=10835&slug=what-are-the-worst-side-effects-of-lunesta Lunesta is the brand name for eszopiclone. It is prescribed to treat insomnia and works by neurotransmitters in the brain. Lunesta is a non-benzodiazepine sedative hypnotic drug. Sometimes people are thinking is Lunesta a controlled substance? Yes, Lunesta is a controlled substance and classified as a schedule IV drug. Even though it is effective for improving sleep cycles, it can cause dependence, misuse, or long-term use. At that time, you may need the treatment of Lunesta addiction for your recovery.