Could a light beam lift depression when drugs fail?
NCT ID NCT07543328
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests a non-invasive light therapy called transcranial photobiomodulation (tPBM) on the forehead to help people with treatment-resistant depression. About 40 adults who still have moderate-to-severe depression despite taking antidepressants will receive tPBM at different frequencies. The goal is to see if it reduces depressive symptoms, especially physical complaints like pain or fatigue, and to understand how it affects brain activity.
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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 40 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Mar 2027
An estimate. End dates often move.
- Lead sponsor
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A government agency
The lead sponsor is a government body.
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 to 65 years
- 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.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Must have a current diagnosis of Major Depressive Disorder (MDD). The clinical severity must be evaluated by a psychiatrist as moderate or above, defined as a Clinical Global Impression-Severity (CGI-S) score \> 4 and a 17-item Hamilton Depression Rating Scale (HDRS-17) total score ≥ 18. Must be currently receiving stable antidepressant treatment for at least four weeks but showing inadequate response (treatment-resistant). This study will be conducted as an add-on therapy. Must have full behavioral capacity, normal intellectual functioning, and the ability to comprehend and sign the informed consent form. Exclusion Criteria: Individuals diagnosed with Bipolar Disorder or Schizophrenia. Individuals with current or recent Substance Use Disorder. History of organic brain lesions (e.g., neurodegenerative diseases, epilepsy, stroke) or any medical conditions affecting central nervous system function. Individuals with abnormal intellectual functioning based on clinical judgment (e.g., suspected intellectual disability, severe learning difficulties). Individuals who are currently pregnant (due to limited evidence regarding the safety of tPBM during pregnancy). Any other condition that, in the investigator's judgment, would render the participant unable to cooperate, unsuitable for the study, or unwilling to sign the informed consent.
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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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Taipei Veterans General Hospital
RECRUITINGTaipei, 11217, Taiwan
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Other studies related to the condition(s) this trial covers.
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