Randomised clinical trial: high-dose oral thiamine versus placebo for chronic fatigue in patients with quiescent inflammatory bowel disease.

Alimentary Pharmacology & Therapeutics
Palle BagerJens Frederik Dahlerup

Abstract

Fatigue is a burdensome symptom for patients with inflammatory bowel disease (IBD). Few pharmacological interventions have documented effect on fatigue in patients with IBD. A pilot study indicated a 20-day effect  with high-dose thiamine. To investigate the effect and safety of high-dose oral thiamine (600-1800 mg/d) based on gender and weight on chronic fatigue in patients with quiescent IBD. This was a randomised, double-blinded, placebo-controlled crossover trial. Patients had quiescent IBD, severe chronic fatigue and no other explanation for fatigue. Patients were allocated 1:1 to either 1) high-dose oral thiamine for 4 weeks, 4 weeks of washout, 4 weeks of oral placebo or 2) oral placebo for 4 weeks, 4 weeks of washout, 4 weeks of high-dose oral thiamine. Fatigue was measured using the Inflammatory Bowel Disease-Fatigue Questionnaire. The primary outcome was improvement (≥3 points) of fatigue after 4 weeks on thiamine. Forty patients were enrolled between November 2018 and October 2019. Crossover analysis showed a mean reduction of 4.5 points (95% CI 2.6-6.2) in fatigue after thiamine compared with a mean increase of 0.75 point (95% CI -1.3-2.8; P = 0.0003) after placebo. Furthermore, 55% of group 1 and 75% of group 2 sho...Continue Reading

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