Eszopiclone is a white to light-yellow crystalline solid.
LUNESTA tablets contain
- 1 mg, 2 mg, or 3 mg eszopiclone and
- the following inactive ingredients:
- calcium phosphate,
- colloidal silicon dioxide,
- croscarmellose sodium,
- hypromellose,
- lactose,
- magnesium stearate,
- microcrystalline cellulose,
- polyethylene glycol,
- titanium dioxide, and
- triacetin.
In addition, both the 1 mg and 3 mg tablets contain FD&C Blue #2.
The precise mechanism of action of eszopiclone as a hypnotic is unknown, but its effect is believed to result from its interaction with GABA-receptor complexes at binding domains located close to or allosterically coupled to benzodiazepine receptors.
Eszopiclone is a nonbenzodiazepine hypnotic that is a pyrrolopyrazine derivative of the cyclopyrrolone class with a chemical structure unrelated to pyrazolopyrimidines, imidazopyridines, benzodiazepines, barbiturates, or other drugs with known hypnotic properties.
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