Green light therapy: a new hope for fibromyalgia pain?
NCT ID NCT05569486
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This study tests whether green light therapy can reduce pain in people with fibromyalgia by calming brain inflammation. Researchers will use brain scans and spinal fluid tests to see how the light affects pain pathways. The trial involves 70 adults with moderate to severe pain who have not found relief from other treatments.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- green light therapy (device)
- What this could lead to
- If successful, this could reveal how green light reduces pain, supporting its use as a non-drug treatment for fibromyalgia.
- What could go wrong
- This is an early-stage study with only 70 participants, focused on understanding mechanisms rather than proving effectiveness. Results may not lead to a treatment.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 70 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Dec 2026
An estimate. Start dates often move.
- Expected to finish
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Dec 2029
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * 18 years or older who can speak and understand English * Meets the diagnostic criteria for fibromyalgia accroding to the 2016 revisions to the 2010/2011 fibromyalgia diagnostic criteria. * Average numeric pain score of 5 out of 10 or greater over the 10 weeks prior to enrolling in the study, and failure of medical therapy to control their pain. Exclusion Criteria: * Serious mental illness defined as distortions of perception, delusions, hallucinations, and unusual behaviors resulting in loss of contact with reality. This will be assessed during the screening interview. Patients with psychiatric disorders will have their medical record reviewed prior to enrollment * History of color blindness or uncorrected cataracts * Subjects receiving remuneration for their medical condition. * Genotype of low affinity binders for translocator protein, (TSPO), as patients with low affinity binding TSPO may not have adequate uptake for the radioactive tracer used for the PET scan.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Banner University Medical Center Multispecialty Services Clinic
Tucson, Arizona, 85711, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a light bulb dial down chronic pain?
- Can a Hands-On nerve technique ease Fibromyalgia's grip?
- Why some days hurt more: charting Fibromyalgia's daily swings
- Zapping the vagus nerve: a new hope for fibromyalgia pain?
- Can a Video-Call stretching program ease fibromyalgia pain?
- Writing as medicine: can words soothe chronic pain?