Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 to 65

Using cannabidiol to treat anxiety and depression in bipolar disorder

Official title: Assessing the Impact of Cannabidiol for Anxiety and Depression in Bipolar Disorder

Run by Mclean Hospital · NCT05457465 · Data updated 2026-11-12

This study is testing if a special CBD product can help people with bipolar disorder who also struggle with anxiety and depression feel better over four weeks.

More Bipolar Disorder trials

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment25 (estimated)
SponsorMclean Hospital
Academic / other
Locations1 site (Belmont, Massachusetts)
StatusRecruiting
StartedJune 1, 2023
Main results expectedDecember 2026
Study endsDecember 2026
Registry record updatedMarch 30, 2026
Trial IDNCT05457465 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18-65 with a diagnosis of bipolar disorder who experience moderate to severe anxiety.

Probably not a fit

Patients currently experiencing acute manic or depressive episodes, or those with a history of substance use 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 pilot open-label clinical trial investigates the effects of a custom-formulated high-CBD product on patients with bipolar disorder who experience anxiety. Over a four-week period, participants will self-administer the CBD solution twice daily while undergoing assessments to evaluate their mental health and quality of life. The study aims to gather preliminary data on the anxiolytic and antidepressant properties of hemp-derived cannabidiol in this specific patient population. Participants will be carefully screened to ensure they meet eligibility criteria before starting the treatment.

Why it matters

Potential benefit: If successful, this study could provide a novel therapeutic option for managing anxiety and depression in individuals with bipolar disorder.

How similar studies have gone: While there is growing interest in cannabinoid-based treatments, this specific approach has not been previously tested in individuals with bipolar disorder, making it a novel investigation.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Provides informed consent
* Between the ages of 18-65
* Fluent in English
* Meets DSM-5 criteria for bipolar disorder (type I or II)
* Experiences at least moderate levels of anxiety (as evidenced by self-reported rating scales)
* On a stable pharmacotherapeutic regimen

Exclusion Criteria:

* Not fluent in English
* Estimated IQ \<75
* Current substance use disorder, current eating disorder, current or past psychotic disorder (e.g. schizophrenia, schizoaffective disorder)
* Endorsement of suicidality
* Experiencing acute manic episode
* Experiencing acute depressive episode
* History of head injury/loss of consciousness \>5 minutes
* Current regular use of cannabinoid products
* Pregnant or breastfeeding
* Presence of serious medical illness or neurological disorder
* Allergy to palm oil
* Current use of valproate or divalproex; other concomitant medications may result in exclusion on a case-by-case basis
* Currently enrolled in another clinical trial that involves a treatment
* Elevated LFTs at screening visit

Where it's running

  • McLean Hospital
    Belmont, Massachusetts, United States
    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.