SPL Set ID: ac768bab-8afa-4446-bc7f-caeeffec0cda
1 drug(s) with this SPL Set ID
XENAZINE (tetrabenazine) is a monoamine depletor for oral administration. The molecular weight of tetrabenazine is 317.43; the pKa is 6.51. Tetrabenazine is a hexahydro-dimethoxy-benzoquinolizine derivative and has the following chemical name: cis rac –1,3,4,6,7,11b-hexahydro-9,10-dimethoxy-3-(2-methylpropyl)-2H-benzo[a]quinolizin-2-one. The empirical formula C 19 H 27 NO 3 is represented by the following structural formula: Tetrabenazine is a white to slightly yellow crystalline powder that is sparingly soluble in water and soluble in ethanol. Each XENAZINE (tetrabenazine) tablet contains either 12.5 or 25 mg of tetrabenazine as the active ingredient. XENAZINE (tetrabenazine) tablets contain tetrabenazine as the active ingredient and the following inactive ingredients: lactose, magnesium stearate, maize starch, and talc. The 25 mg strength tablet also contains yellow iron oxide as an inactive ingredient. XENAZINE (tetrabenazine) tablets are supplied as a yellowish-buff, scored tablet containing 25 mg of tetrabenazine or as a white, non-scored tablet containing 12.5 mg of tetrabenazine. Chemical Structure