Lunesta 3 mg is a specific dose of eszopiclone, a medicine often used to treat insomnia. It is a sedative-hypnotic medicine that regulates sleep by influencing specific neurotransmitters in the brain.
Lunesta 2 mg (eszopiclone) is a prescription medicine that is often used in the short term to treat insomnia. It is classified as a sedative-hypnotic medicine and works by changing certain chemicals in the brain that may be out of balance in persons who have sleep issues.