Open Label Extension Study to Evaluate the Safety and Tolerability of Oral Fampridine-Sustained Release (SR) in Canadian Participants With Multiple Sclerosis Who Participated in Acorda Extension Trials.

10 mg twice a day (BID) sustained-release (SR) tablets by mouth for up to 27 months (in addition to treatment in previous studies) or until the product is commercially available, whichever comes first. Doses of study treatment must be spaced at least 12 hours apart.