The present invention relates to processes for reducing impurities in lacosamide during the preparation of lacosamide. The invention provides processes for minimizing or removing impurities such as (2R)-2-(acetylamino)-3-(benzylamino)-3-oxopropyl acetate of Formula II or (2R)-2-propanoylamino-N-benzyl-3-methoxypropionamide of Formula III in lacosamide.