 Participants n20 will be identified at routine care visits performed at the Rochester Multiple Sclerosis Center. Eligible participants will have MS by McDonald Criteria,7 and will have a modified Ashworth spasticity rating8 of two or higher in at least one lower extremity muscle group. Participants will be seen at screening, one, and three months, and will be evaluated using the modified Ashworth scale,8 pendulum test,9 toe tapping test,10 manual muscle testing,11 timed 25 foot walk,12 and Multiple Sclerosis Functional Composite.13 The type and severity of any adverse events will be recorded using standard definitions. Participants will be instructed to call between visits to inform the investigators regarding any adverse events they experience. Follow-up will continue until all adverse events resolve or stabilize. 