Steinberg, P, McNutt, B E, Marshall, P et al. · The Journal of allergy and clinical immunology · 1996 · DOI
Researchers tested whether terfenadine, an antihistamine medication, could help reduce ME/CFS symptoms in 28 patients over two months. Despite finding that most ME/CFS patients had signs of allergies, the medication showed no benefit for fatigue, functioning, or overall well-being compared to placebo. This study suggests antihistamines are unlikely to be an effective treatment for ME/CFS.
This rigorous placebo-controlled trial definitively tested a plausible immunological hypothesis—that antihistamines might benefit ME/CFS patients with documented allergic responses. The negative result helps prevent ineffective treatments from being recommended and redirects research toward more promising therapeutic approaches.
This study does not prove that immune dysregulation plays no role in ME/CFS, only that antihistamine treatment is not effective despite immune abnormalities being present. It also does not rule out potential benefits in subsets of patients with specific allergic conditions, nor does it address whether other immunological interventions might be helpful.
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
Steinberg, P, McNutt, B E, Marshall, P, Schenck, C, Lurie, N, Pheley, A, et al. (1996). Double-blind placebo-controlled study of the efficacy of oral terfenadine in the treatment of chronic fatigue syndrome.. The Journal of allergy and clinical immunology. https://doi.org/10.1016/s0091-6749(96)70290-7
BibTeX
@article{mecfsatlas-steinberg-1996-double-blind,
author = {Steinberg, P and McNutt, B E and Marshall, P and Schenck, C and Lurie, N and Pheley, A and Peterson, P K},
title = {Double-blind placebo-controlled study of the efficacy of oral terfenadine in the treatment of chronic fatigue syndrome.},
journal = {The Journal of allergy and clinical immunology},
year = {1996},
doi = {10.1016/s0091-6749(96)70290-7},
note = {PubMed: 8568124},
url = {https://www.mecfsatlas.com/evidence/steinberg-1996-double-blind},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/steinberg-1996-double-blind
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