Disclosed are novel pharmaceutical formulations containing N-{3-[3-cyclopropyl-5- (2-fluoro-4-iodo-phenylamino)-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydro-2H- pyrido[4,3-d]pyrimidin-1 -yl]phenyl}acetamide dimethyl sulfoxide solvate, methods of using the compositions in therapy and processes for preparing the same.
