Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 30 and up

Exploring how gut bacteria affect cannabis oil treatment in fibromyalgia patients

Official title: Biosignature of the Response to Treatment With Cannabis Oil in Individuals With Fibromyalgia

Run by Rambam Health Care Campus · NCT06946940 · Data updated 2026-11-12

This study is testing how gut bacteria might affect how well cannabis oil works for people with fibromyalgia.

More Fibromyalgia trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages30 Years and up
SexAll
Enrollment150 (estimated)
SponsorRambam Health Care Campus
Academic / other
Locations1 site (Haifa)
StatusRecruiting
StartedMay 30, 2024
Main results expectedMay 2026
Study endsMay 2027
Registry record updatedApril 27, 2025
Trial IDNCT06946940 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 30 and over with a confirmed diagnosis of fibromyalgia and significant pain despite standard treatments.

Probably not a fit

Patients with recent cannabis use, significant comorbid conditions, or psychiatric disorders may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates the relationship between gut microbiome composition and the effectiveness of cannabis oil in treating fibromyalgia. It involves a double-blinded randomized controlled trial with 150 participants who will receive either cannabis oil (5% THC, 5% CBD) or a placebo. The study will assess patient-reported outcomes, sensory testing, and microbiome composition at baseline and during treatment. By analyzing these factors, researchers aim to understand why some patients respond better to cannabis oil than others.

Why it matters

Potential benefit: If successful, this study could lead to personalized treatment approaches for fibromyalgia, improving pain management for patients.

How similar studies have gone: While there is growing interest in the use of cannabis for fibromyalgia, this specific approach linking gut microbiome composition to treatment response is novel and has not been extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adult men and women aged 30 years and over.
* Diagnosis of fibromyalgia confirmed according to the 2016 diagnostic criteria by a pain specialist, with relevant symptoms lasting 12 months or more.
* An average reported pain ≥ 6 during the preceding week.
* Eligible for cannabis at the discretion of the treating physician.
* Has remained symptomatic despite receiving standard care for fibromyalgia including analgesics, anti-depressants (tricyclic and SNRI) and anti-epileptic agents.

Exclusion Criteria:

* Patients who have used cannabis during the preceding month.
* Any significant comorbid condition at the discretion of the PI (e.g. inflammatory arthritis, inflammatory bowel disease, cancer).
* Personal or family history of psychotic disorders.
* Current or past anxiety disorder.
* Any uncontrolled psychiatric pathology.
* Current or history of substance addiction or abuse.
* Diagnosed dementia or cognitive impairment.
* Personal history of cardiovascular disease.
* Pregnancy, lactation or intention to conceive.
* Known allergy to any of the cannabis oil ingredients.
* Patients with a history of seizure disorder (excluding childhood febrile convulsions) or epilepsy.
* Active liver disease.
* Any contraindication to the use of MC.
* Inflammatory Bowel Disease (IBD).

Where it's running

  • Rambam Health Care Campus
    Haifa, Israel
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.