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Sulbutiamine shows promising results in reducing fatigue in patients with multiple sclerosis

      Highlights

      • Fatigue is the most frequent and often debilitating symptom for patients with MS.
      • There are no available effective drugs for fatigue associated with MS.
      • Sulbutiamine increases the levels of thiamine and its phosphate esters in the brain.
      • In the current study sulbutiamine intake reduced fatigue symptoms in patients with MS.
      • This is the first study to show a positive effect of sulbutiamine on fatigue in MS.

      Abstract

      Background

      Fatigue is the most frequent and often debilitating symptom for patients with multiple sclerosis (MS). There are no available effective therapies for fatigue associated with MS, and it is unclear whether a successful therapy of MS leads to clinical improvement. Sulbutiamine is a lipophilic compound that crosses the blood–brain barrier more readily than thiamine and increases the levels of thiamine and thiamine phosphate esters in the brain. Whereas several clinical trials have demonstrated the beneficial effects of sulbutiamine in patients with asthenia, there have been no reports on the effects of sulbutiamine on fatigue in patients with MS.

      Objectives

      Our study was designed to evaluate the short-term effects of sulbutiamine on fatigue in patients with MS.

      Methods

      Patients were included if fatigue was one of their three predominant symptoms. They were required to have a total score on the Fatigue Impact Scale (FIS) of >20, and on the Beck Depression Inventory of <17, and no relapse in the last 3 months prior to onset of the study. Patients were advised to receive 400 mg orally of sulbutiamine once daily for two months. The outcome of the study was in the changes of FIS.

      Results

      Twenty-six patients with MS (18 females and 8 males) were selected. The patients were 18–57 years of age (mean:37,2). The average score of Expanded Disability Status Scale (EDSS) of the patients was 2,71. A significant number of the subjects who were on some kind of disease modifying treatment (DMT) demonstrated obvious improvement in their total FIS scores, whereas none of the subjects who were not on any DMT improved (13/23 vs. 0/5). The average fatigue score was 77 (SD:30,5) at the baseline and 60,5 (SD:29,7) on Day 60, respectively. Sulbutiamine intake resulted in a significant reduction on the total score of FIS and on all three subscales assessing physical, cognitive, and psychosocial functioning (all p-values < 0,01). There were no serious adverse events.

      Conclusions

      Sulbutiamin appears to be effective in treating fatigue in MS; particularly in patients who were on some DMT, but not on those who were not. It is well-tolerated by all. This observation may encourage further evaluations of the efficacy of sulbutiamine on fatigue in MS.

      Keywords

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