SPL Set ID: 52781229-ee82-43f9-a113-4419a611978d

Rivastigmine tartrate USP is a reversible cholinesterase inhibitor and is known chemically as (S)-N-Ethyl-N-methyl-3-[1-(dimethylamino)ethyl]-phenyl carbamate hydrogen-(2R,3R)-tartrate. Rivastigmine tartrate is commonly referred to in the pharmacological literature as SDZ ENA 713 or ENA 713. It has a molecular formula of C 14 H 22 N 2 O 2 • C 4 H 6 O 6 (hydrogen tartrate salt – hta salt) and a molecular weight of 400.43 g/mol (hta salt). Rivastigmine tartrate is a white to off-white powder, that is very soluble in water and in methanol, very slightly soluble in ethyl acetate and soluble in ethanol. The distribution coefficient at 37°C in n-octanol/phosphate buffer solution pH 7 is 3.0. Rivastigmine tartrate capsules, USP contain rivastigmine tartrate, equivalent to 1.5 mg, 3 mg, 4.5 mg and 6 mg of rivastigmine base for oral administration. Inactive ingredients are colloidal silicon dioxide, hypromellose 5 cps, magnesium Stearate and microcrystalline cellulose. Each hard-gelatin capsule contains gelatin, titanium dioxide and black, red and yellow iron oxides (1.5 mg), red and yellow iron oxides (3 mg and 6 mg) and red iron oxide (4.5 mg). Structural Formula