药物信息为Levetiracetam Tablets (Torrent Pharmaceuticals Limited): DESCRIPTION

Levetiracetam is an antiepileptic drug available as 250 mg (blue), 500 mg (yellow), 750 mg (orange), and 1000 mg (white) tablets.

The chemical name of levetiracetam, USP, a single enantiomer, is (-)-(S)-a-ethyl-2-oxo-1-pyrrolidine acetamide, its molecular formula is C₈H₁₄N₂O₂ and its molecular weight is 170.21. Levetiracetam, USP is chemically unrelated to existing antiepileptic drugs (AEDs). It has the following structural formula:

Levetiracetam, USP is a white to off-white crystalline powder with a faint odor and a bitter taste. It is very soluble in water (104.0 g/100 mL). It is freely soluble in chloroform (65.3 g/100 mL) and in methanol (53.6 g/100 mL), soluble in ethanol (16.5 g/100 mL), sparingly soluble in acetonitrile (5.7 g/100 mL) and practically insoluble in n-hexane. (Solubility limits are expressed as g/100 mL solvent.)

Levetiracetam tablets contain the labeled amount of levetiracetam, USP. Inactive ingredients: colloidal silicon dioxide, corn starch, hypromellose, magnesium stearate, polyethylene glycol 400, povidone, sodium starch glycolate, talc, titanium dioxide, and additional agents listed below:

250 mg tablets: FD&C Blue # 2 Lake of indigo carmine

500 mg tablets: Ferric oxide yellow

750 mg tablets: Ferric oxide red and FD&C # 6 lake of sunset yellow