Find your sleeping solution Order Lunesta Online. Our medical store offers alternative brands with saving up to 70% and free delivery across the USA. Lunesta is a prescription medication used to treat insomnia, a sleep disorder characterized by difficulties falling asleep or staying asleep. Its active ingredient is eszopiclone, which belongs to a class of drugs known as sedative-hypnotics. Lunesta works by affecting certain chemicals in the brain that may be unbalanced in people with sleep problems. It helps to initiate sleep and can improve the quality and duration of sleep.