Eszopiclone is a prescription medication primarily used to treat insomnia, helping individuals fall asleep and stay asleep throughout the night. It belongs to a class of drugs known as sedative-hypnotics, which work by affecting certain chemicals in the brain to promote relaxation and sleep. Typically taken just before bedtime, eszopiclone is known for its relatively quick onset of action. Common side effects may include dizziness, headache, and an unusual taste in the mouth. It is important to use this medication under the guidance of a healthcare professional to ensure safety and effectiveness.