Eszopiclone 2 mg– Insomnia Treatment Information Eszopiclone is a prescription sleep medication used to treat insomnia, including difficulty falling asleep and staying asleep. It works by interacting with brain receptors that regulate sleep cycles. Eszopiclone 2 mg is classified as a controlled medication and may cause side effects such as next-day drowsiness, dizziness, or an unpleasant taste. Long-term use should be periodically reviewed to prevent dependence or reduced effectiveness. Eszopiclone 2 mg capsule should be taken only when sufficient time for sleep is available and under the guidance of a licensed healthcare provider.