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Could CBD ease endometriosis pain? new trial aims to find out

NCT ID NCT06477406

Symptom relief Sponsor: Mclean Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 22, 2026 · Updated 2 times

Summary

This phase 2 trial tests a custom high-CBD sublingual product against a placebo in 30 women with endometriosis. Over 12 weeks, researchers will measure changes in pain and quality of life. The goal is to see if cannabinoids can help manage symptoms where few proven options exist.

What this could mean

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

Active substance
high-CBD hemp-derived sublingual solution
What this could lead to
If it works, this could point toward a new, non-drug option for managing endometriosis pain.
What could go wrong
This is a small early-phase trial with only 30 people, so results may not apply to everyone. It tests symptom relief, not a cure, and participants must stop using other cannabis products.

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

Phase 2

Tests whether the treatment actually works, and watches for side effects, in a larger group.

Participants

About 30 people

The number the study aims to enrol. It can still change while the study runs.

Started

Feb 2024

Expected to finish

Oct 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

21 years and older

Sex

Female participants only

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: 1. Subject has provided informed consent 2. Sex assigned female at birth 3. Subject is 21 or older 4. Subject is fluent in English 5. Subject endorses at least moderate levels of pain at the baseline visit 6. Subject endorses having endometriosis Exclusion Criteria: 1. Non-fluent English speakers 2. Endorsement of current substance use disorder, psychotic disorder, or an eating disorder 3. Currently uses cannabis or cannabinoid products regularly 4. Patients will be excluded if they have a positive urine pregnancy test, are trying to become pregnant, or are currently breastfeeding 5. Presence of a serious or unstable medical illness, including liver, kidney, or cardiovascular disease (hyper/hypotension, cardiac disorders), or neurological disorder (including seizure disorder) 6. Neuropathic pain or cancer-related pain 7. Disclosure of a genetic polymorphism affecting CYP2C9 function

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Conditions

The condition(s) this trial relates to.

endometriosis

As listed by the trial registrant

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

Endometriosis

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. 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

  • McLean Hospital

    RECRUITING

    Belmont, Massachusetts, 02478, United States

More trials for these conditions

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