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  • Title: Changes in Cognitive Processing Speed, Mood, and Fatigue in an Observational Study of Persons With Multiple Sclerosis Treated With Dalfampridine-ER.
    Author: Triche EW, Ruiz JA, Olson KM, Lo AC.
    Journal: Clin Neuropharmacol; 2016; 39(2):73-80. PubMed ID: 26818040.
    Abstract:
    OBJECTIVE: Multiple sclerosis (MS) is a degenerative neurological condition that results in impairments in multiple domains including cognition, fatigue, and mood. Dalfampridine-extended release (D-ER) has been approved to improve walking in persons with MS. It is plausible that D-ER could improve cognition, fatigue, and mood through the same mechanisms. We aim to examine effects of D-ER on cognition, depression, mood, and fatigue and to describe how these associations differ among those with and without D-ER related improvements in walking speed. METHODS: Patients with MS at the Mandell Center who were newly prescribed D-ER as part of their standard MS care were invited to participate in this observational pre-post study. Thirty-nine participants with MS were observed for 14 weeks; 31 remained on D-ER for 14 weeks or longer. Of these, 28 were then subdivided based on walk responder status. Cognition was assessed using the SDMT; depression was measured with the CESD. Self-reported cognition, mood, and fatigue were also measured using subscales of the Performance Scales (PS). RESULTS: Among those on drug through 14 weeks, there was significant improvement in the SDMT (P < 0.001) and the PS Fatigue score (P = 0.04). Among those who discontinued drug before 14 weeks, PS Cognition and PS Mood scores significantly improved (P = 0.02). Timed walk responders had significant improvements in SDMT (P < 0.001) and PS Fatigue (P = 0.046) from baseline to week 14. Among timed walk nonresponders, none of the measures significantly changed. CONCLUSIONS: Dalfampridine-extended release may improve cognition and fatigue in persons with MS, especially among timed walk responders.
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