A process for reducing dimethylamine content in metformin hydrochloride is disclosed. The process comprises: (a) providing metformin hydrochloride having dimethylamine content more than 15 ppm; (b) pulverizing the metformin hydrochloride; (c) slurrying the metformin hydrochloride in one or more Cj-C4 alcohol solvents; and (d) isolating the metformin hydrochloride.
