Efficacy of dalfampridine in neuromyelitis optica spectrum disorder: A pilot study.

OBJECTIVE: To assess the efficacy of dalfampridine in patients with neuromyelitis optica spectrum disorder.

METHODS: We included 15 consecutive patients, who were started on a treatment of dalfampridine 10 mg twice daily for 2 weeks. Efficacy assessment was based on walking ability improvement using Timed-25-Foot Walk and 12-item Multiple Sclerosis Walking Scale tests.

RESULTS: The mean Timed-25-Foot Walk score was reduced from 14.8 (±2.4) to 11.3 (±1.9) seconds ( p  = 0.01). The mean score on the 12-item Multiple Sclerosis Walking Scale was reduced from 41.2 (±3.5) to 31.4 (±3.2) ( p  = 0.004).

CONCLUSION: Dalfampridine seems to be useful for symptomatic treatment of walking impairment in neuromyelitis optica spectrum disorder.