SPL Set ID: 463d31dd-ff14-cc89-e063-6294a90a2ea9

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 USP is a white to off-white powder with a pK a1 of 4.2 and a pK a2 of 10.6. It is freely soluble in water and both basic and acidic aqueous solutions. 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 mg, 50 mg, 75 mg, 100 mg, 150 mg, 200 mg, 225 mg, and 300 mg of pregabalin USP, along with corn starch and talc as inactive ingredients. The capsule shells contain gelatin, titanium dioxide, and sodium lauryl sulphate. In addition, 75 mg, 100 mg, 200 mg, 225 mg and 300 mg capsules contain red iron oxide. The imprinting ink contains black iron oxide, potassium hydroxide, propylene glycol, and shellac.