SPL Set ID: 65d9e751-61c2-4741-85c0-2526cfdc765c

Pregabalin is described chemically as ( S )-3-(aminomethyl)-5-methylhexanoic acid. The molecular formula is C 8 H 17 NO 2 and the molecular weight is 159.23. The chemical structure of pregabalin is: Pregabalin is a white to off-white, crystalline solid with a pK a1 of 4.2 and a pK a2 of 10.6. It is freely soluble in 1N Hydrochloric acid and sparingly soluble in water. The log of the partition coefficient (n-octanol/0.05M phosphate buffer) at pH 7.4 is – 1.35. Pregabalin Capsules are administered orally and are supplied as imprinted hard-shell capsules containing 25, 50, 75, 100, 150, 200, 225, and 300 mg of pregabalin, along with pregelatinized starch and talc as inactive ingredients. The capsule shells contain gelatin, titanium dioxide, sodium lauryl sulfate and water. In addition, the orange capsule shells (75 mg, 100 mg, 200 mg, 225 mg and 300 mg strengths) contain red iron oxide. Colloidal silicon dioxide is used as processing aid. The imprinting ink contains shellac, black iron oxide, propylene glycol, potassium hydroxide. Structure