Abstract
Objectives: The purpose of this study was to compare the relative efficacy of acetylsalicylic acid (ASA) and amantadine for the treatment of fatigue in multiple sclerosis (MS).Methods: A 10-week, randomized double-blind crossover clinical trial conducted from October 2009 to September 2010. Fifty-two patients with MS presenting fatigue at 21 to 53 years of age were randomly allocated to the two treatment groups. The first group received amantadine (100 mg twice daily) for a total of 4 weeks. The second group received ASA (500 mg once daily) for four weeks. After a 2-week washout period, they crossed over to the alternative treatment for 4 weeks. Patients were rated at baseline and the end of each phase with the Fatigue Severity Scale (FSS).Results: ASA appeared to be equivalent in efficacy and safety to amantadine. A significant decrease in FSS occurred in both groups. Of the 26 patients treated with amantadine, the mean (SD) of FSS decreased from 4·8 (1·4) to 4·0 (1·4) (P<0·001). In the 26 patients treated with ASA, the mean (SD) of FSS decreased from 4·6 (1·4) to 3·5 (1·5) (P<0·001).Discussion: This study demonstrates that both ASA and amantadine significantly reduce MS-related fatigue. Both ASA and amantadine have previously been shown to reduce fatigue, and we postulate that treatment with ASA and amantadine may have similar benefits.
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