Treating chronic fatigue syndrome - a study into the scientific evidence for pharmacological treatments.
Kreijkamp-Kaspers, Sanne, Brenu, Ekua Weba, Marshall, Sonya et al. · Australian family physician · 2011
Quick Summary
This study looked at what medicines and supplements 94 people with ME/CFS were taking and checked what scientific evidence supported their use. The patients were using hundreds of different treatments, with antidepressants, pain relievers, sleep aids, and B vitamins being the most common. However, when researchers searched for rigorous studies proving these treatments work for ME/CFS, they found very limited evidence—only 20 good-quality trials existed for the medicines patients were using.
Why It Matters
ME/CFS patients often try multiple medications seeking symptom relief, yet most treatments lack rigorous scientific validation specifically for this condition. This study quantifies the evidence gap and highlights the disconnect between what patients use and what is proven effective, helping both patients and doctors make more informed treatment decisions and identifying priorities for future research.
Observed Findings
94 ME/CFS patients reported taking 474 different medicines and supplements combined
Antidepressants were the most frequently used medication class
Analgesics, sedatives, and B vitamins were also among the most common treatments
Only 20 randomised controlled trials were identified studying pharmacological treatments in CFS patients
A substantial gap exists between the number of treatments used (474) and treatments with rigorous evidence (20 trials)
Inferred Conclusions
The evidence base for pharmacological treatment of ME/CFS is severely limited despite widespread medication use by patients
Conventional and complementary medicines are used extensively in clinical practice without adequate scientific validation in CFS populations
There is an urgent need for well-designed randomised controlled trials investigating treatments that patients are already using
Current treatment decisions in ME/CFS are largely based on clinical experience rather than robust scientific evidence
Remaining Questions
Which of the 474 medicines and supplements patients reported using are most effective, and which are ineffective or harmful?
What This Study Does Not Prove
This study does not prove that the medications patients were taking are ineffective—only that they lack sufficient rigorous testing in ME/CFS populations. It does not establish whether treatments helped or harmed individual patients, as it is an overview of evidence rather than a clinical trial. The study also cannot determine why patients chose these medications or whether they experienced benefit from them.