<p>Zopiclone, a cyclopyrrolone derivative, is a short-acting hypnotic agent. This is structurally unrelated to existing hypnotics. However, the pharmacological profile of Zopiclone is similar to that of the benzodiazepines. Zopiclone pharmacological properties are: hypnotic, sedative, anxiolytic, anti-convulsant, muscle-relaxant. These effects are related to a specific agonist action at central receptors belonging to the GABAA&nbsp;macromolecular complex, modulating the opening of the chloride ion channel.</p>