Buy Lunesta Online from a safe and secure source careskit.com. Lunesta is a medication used to treat a certain sleep problem (insomnia). It may help you fall asleep faster, stay asleep longer, and lessen how often you wake up during the night, so you can get a better night's rest. Eszopiclone belongs to a class of drugs called sedative-hypnotics. It acts on your brain to produce a calming effect. It was approved by the FOOD AND DRUG ADMINISTRATION(FDA) in 2004.