Following its approval earlier this year, Elan Drug Technologies has announced the launch of Ampyra (dalfampridine) by Acorda Therapeutics in the U.S. as a treatment to improve walking in patients with multiple sclerosis. The first NDA approved and launched incorporating Elan's MXDAS technology, Ampryra was developed using a hydrophilic matrix, which controls the rate of release of dalfampridine through a process of diffusion and erosion in the gastrointestinal tract. Release