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Eszopiclone tablets are indicated for the treatment of insomnia. In controlled outpatient and sleep laboratory studies, eszopiclone tablets administered at bedtime decreased sleep latency and improved sleep maintenance.
The clinical trials performed in support of efficacy were up to 6 months in duration. The final formal assessments of sleep latency and maintenance were performed at 4 weeks in the 6-week study (adults only), at the end of both 2-week studies (elderly only) and at the end of the 6-month study (adults only).
Eszopiclone is a nonbenzodiazepine hypnotic agent that is a pyrrolopyrazine derivative of the cyclopyrrolone class. The chemical name of eszopiclone is (+)-(5S)-6-(5-chloropyridin-2-yl)-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b] pyrazin-5-yl 4-methylpiperazine-1-carboxylate. Its molecular weight is 388.82, and its empirical formula is C 17H 17ClN 6O 3. Eszopiclone has a single chiral center with an ( S)-configuration. It has the following chemical structure:
Eszopiclone is a white to light-yellow crystalline solid. Eszopiclone is very slightly soluble in water, slightly soluble in ethanol, and soluble in phosphate buffer (pH 3.2).
Eszopiclone is formulated as film-coated tablets for oral administration. Eszopiclone tablets contain 1 mg, 2 mg, or 3 mg eszopiclone and the following inactive ingredients: microcrystalline cellulose, pregelatinized starch, anhydrous lactose, croscarmellose sodium, colloidal silicon dioxide, magnesium stearate, titanium dioxide, hypromellose, polyethylene glycol, polysorbate 80 (for 1 mg & 2 mg), FD&C Blue #2 (for 1 mg & 3 mg), FD&C Yellow #6 (for 3 mg) and FD&C Red #40 (for 3 mg).