NICE Guideline Committee · National Institute for Health and Care Excellence (NICE) · 2021 · DOI
The UK's National Institute for Health and Care Excellence updated its ME/CFS guidelines after a comprehensive evidence review. The updated guidelines removed Graded Exercise Therapy (GET) and Cognitive Behavioural Therapy (CBT) as recommended treatments, as evidence showed they were not effective and could be harmful. Pacing and energy management were endorsed.
This guideline reversal was a landmark moment in ME/CFS policy. It formally acknowledged that the biopsychosocial model of ME/CFS — underlying GET and CBT recommendations — was unsupported by evidence and potentially harmful. It significantly impacted clinical practice across the UK.
Clinical guidelines synthesize existing evidence but do not generate new scientific knowledge. Removal of GET does not prove a specific alternative mechanism.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
NICE Guideline Committee (2021). Myalgic encephalomyelitis (or encephalopathy)/chronic fatigue syndrome: diagnosis and management. National Institute for Health and Care Excellence (NICE). https://doi.org/10.3310/nihropenres.13121.1
BibTeX
@article{mecfsatlas-nice-2021-guidelines,
author = {NICE Guideline Committee},
title = {Myalgic encephalomyelitis (or encephalopathy)/chronic fatigue syndrome: diagnosis and management},
journal = {National Institute for Health and Care Excellence (NICE)},
year = {2021},
doi = {10.3310/nihropenres.13121.1},
url = {https://www.mecfsatlas.com/evidence/nice-2021-guidelines},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-25. https://www.mecfsatlas.com/evidence/nice-2021-guidelines
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