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Green light therapy: a new hope for chronic pain sufferers?

NCT ID NCT03677206

Symptom relief Sponsor: University of Arizona Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether daily exposure to green LED light can reduce chronic pain. 55 adults with conditions like fibromyalgia or nerve pain will use a green or white light device at home for 2 hours each day over 3 months. Researchers will measure changes in pain levels, medication use, and quality of life.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
green LED light
What this could lead to
If it works, this could offer a drug-free way to manage chronic pain at home.
What could go wrong
This is a small early-stage trial with only 55 people, so results may not apply to everyone. The effect may be no better than white light.

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

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

55 people

The number who actually took part.

Started

Jun 2016

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

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

18 to 80 years

Sex

Anyone

Healthy volunteers

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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults ages 18 - 80 able to understand English and comply with study protocol * Peripheral neuropathy from HIV or chemotherapy. * History of fibromyalgia * Headaches * Chronic Pain * 7-day average numeric pain score of 5/10 or greater at baseline evaluation Exclusion Criteria: * Subjects receiving remuneration for their pain treatment * Subjects that are incarcerated * Subjects unable to read English and complete assessments * Addictive behavior, severe clinical depression, or psychotic features

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Conditions

The condition(s) this trial relates to.

chemotherapy-induced neuropathy Chronic Pain chronic pain syndrome fibromyalgia infectious neuropathy

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Chronic pain

Contacts and locations

Locations

  • Banner University Medical Center South

    Tucson, Arizona, 85713, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.