Buy Lunesta Online 3 mg dose is generally the maximum recommended dose. The exact dose prescribed will depend on individual needs, such as how severe the insomnia is and how well a person responds to treatment. Lunesta works by affecting certain chemicals in the brain that may be unbalanced in people with sleep problems, helping to induce and maintain sleep. It is typically prescribed for short-term use due to the potential for dependence or tolerance over time. It's usually taken once per night just before bedtime, and only if you can get a full night of sleep (7-8 hours).