Abstract
Dalfampridine extended release (D-ER) improves gait speed in some people with multiple sclerosis (MS), but many patients who take D-ER demonstrate only small improvements of questionable clinical significance. Physical therapy (PT) may augment the treatment effects of D-ER on the nervous system and improve clinical outcomes. This case report describes the successful use of D-ER combined with multicomponent PT in a patient who did not have a clinically important change in gait speed with D-ER alone. A 59-year-old woman with a 6-year history of relapsing-remitting MS was prescribed D-ER by her neurologist. After 3 weeks of D-ER therapy (10 mg twice daily), she demonstrated only a 7.1% improvement in the Timed 25-Foot Walk test. She then commenced PT consisting of two 40-minute sessions per week for 6 weeks while continuing D-ER therapy. Training focused on gait, balance, coordination, functional strengthening, and dual-task performance. After 6 weeks of D-ER + PT, she had a further 14.6% improvement in Timed 25-Foot Walk gait speed, for a total improvement of 20.7%, which elevated her above the clinically meaningful threshold of 20%. Similar patterns of improvement were also observed for self-selected gait speed in single- and dual-task conditions. Improvements in fast and dual-task gait speed were retained 3 weeks later. For this patient, combining PT with D-ER therapy improved gait speed more than the use of D-ER alone. Further investigation of D-ER + PT or PT as an alternative to D-ER in patients with submeaningful medication response is warranted.
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