Cannabidiol for Early Psychosis

(STEP-PROMOTE Trial)

Not yet recruiting at 18 trial locations
JR
JD
Overseen ByJennifer Davies
Pivotal Trial (Near Approval)This treatment is in the last trial phase before FDA approval
Prior Safety DataThis treatment has passed at least one previous human trial

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial tests whether cannabidiol (CBD), a compound from the cannabis plant, can reduce early warning signs of psychosis in people at high risk. It also evaluates the safety of CBD for these individuals. Participants will receive either CBD or a placebo (a pill with no active ingredients) to assess differences in symptoms and safety. Individuals who have experienced warning signs of psychosis, such as unusual thoughts or perceptions, may be suitable for the study. As a Phase 3 trial, this study represents the final step before FDA approval, offering participants an opportunity to contribute to potentially groundbreaking treatment advancements.

Do I need to stop my current medications to join the trial?

The trial requires that you stop taking certain medications, such as antipsychotics at specific doses, valproate, and clobazam, before participating. If you're on these medications, you may need to adjust or stop them under your doctor's guidance before joining the trial.

Is there any evidence suggesting that cannabidiol is likely to be safe for humans?

Research has shown that CBD is generally safe for early psychosis. Studies have found that CBD can reduce symptoms in people with schizophrenia. Doses between 600 and 1000 mg have produced positive results without major safety issues. Short-term use of CBD has also helped those at high risk of developing psychosis. Importantly, these studies reported that CBD was well-tolerated, with few serious side effects.

While researchers continue to study CBD, its testing in various trials builds confidence in its safety. However, like any treatment, side effects may occur, so discussing any concerns with a healthcare provider is important.12345

Why do researchers think this study treatment might be promising?

Unlike the standard treatments for early psychosis, which often include antipsychotics, Cannabidiol (CBD) is derived from cannabis plants and offers a different approach by potentially modulating brain signaling without the psychoactive effects. Most traditional treatments work by blocking dopamine receptors, but CBD might provide benefits through its unique interaction with the endocannabinoid system, which is thought to influence mood and cognition. Researchers are excited about CBD because it could offer a new option with potentially fewer side effects and a different mechanism of action, providing hope for those who may not respond well to existing medications.

What evidence suggests that cannabidiol might be an effective treatment for early psychosis?

This trial will compare the effects of Cannabidiol (CBD) with a placebo in participants showing early signs of psychosis. Studies have shown that CBD can help reduce symptoms of psychosis. Research suggests that CBD might work as well as some medications used to treat conditions like schizophrenia. In individuals with early signs of psychosis, CBD has shown promise in improving symptoms and may even reduce the need for other medications. Some studies also found that CBD was well-tolerated, causing fewer side effects. Overall, these findings suggest that CBD holds promise for treating psychosis.12567

Who Is on the Research Team?

PM

Philip McGuire, PhD, MD

Principal Investigator

University of Oxford

Are You a Good Fit for This Trial?

This trial is for people aged 12 to 35 who are at high risk of developing psychosis, based on specific early warning symptoms. Participants must not be in another treatment study and, if able to have children, must use effective birth control during the trial.

Inclusion Criteria

I am between 12 and 35 years old and can give my consent to participate.
2. Meet criteria for either the Attenuated Psychotic Symptoms (APS) or Brief Limited Intermittent Psychotic Symptoms (BLIPS) subgroups of the CHR-P state, defined using the CAARMS (PSYSCAN version), which also integrates the SIPS criteria. Inter-rater reliability will be ensured throughout via an ongoing training programme for the researchers at each site.
3. The participant is currently not participating and is not expecting to start participation during the current trial in another intervention trial (e.g. medication, medical device, psychological intervention).
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Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Treatment

Participants are randomised to treatment with oral CBD 300mg twice daily, or a matching placebo, for 104 weeks. Participants will provide various biological samples and complete neuroimaging assessments.

104 weeks

Taper

Participants undergo a 2-week tapering period after the main treatment phase.

2 weeks

Follow-up

Participants are monitored for safety and effectiveness after treatment, with assessments including clinical and biomarker evaluations.

4 years post-baseline

What Are the Treatments Tested in This Trial?

Interventions

  • Cannabidiol

Trial Overview

The study tests whether taking cannabidiol (CBD) twice daily by mouth can reduce early signs of psychosis compared to a placebo. It is a randomized, double-blind trial where neither participants nor researchers know who gets CBD or placebo.

How Is the Trial Designed?

3

Treatment groups

Active Control

Placebo Group

Group I: Cannabidiol 100g/ml oral solutionActive Control1 Intervention
Group II: Healthy controlsActive Control1 Intervention
Group III: PlaceboPlacebo Group1 Intervention

Find a Clinic Near You

Who Is Running the Clinical Trial?

University of Oxford

Lead Sponsor

Trials
1,113
Recruited
21,220,000+

Wellcome Trust

Collaborator

Trials
236
Recruited
15,770,000+

Jazz Pharmaceuticals

Industry Sponsor

Trials
252
Recruited
35,100+
Bruce C. Cozadd profile image

Bruce C. Cozadd

Jazz Pharmaceuticals

Chief Executive Officer since 2009

BA in Economics from Yale University, MBA from Stanford University

Dr. Austin profile image

Dr. Austin

Jazz Pharmaceuticals

Chief Medical Officer since 2023

MD from the Royal College of Surgeons in Ireland

Citations

Cannabidiol (CBD) as a novel treatment in the early phases of ...

Collectively, these results suggest that CBD may have significant effects on psychotic symptoms in patients with psychosis. The negative results ...

17.2 EFFICACY OF CANNABIDIOL IN THE TREATMENT OF ...

Cannabidiol is a novel drug that has shown potential efficacy in the treatment of psychotic symptoms. Early psychosis is a critical treatment period during ...

The Impact Of Cannabidiol In Patients With Early Psychosis

45 Finally, CBD cigarettes as an adjunct to antipsychotic medication were found to have an antipsychotic medication sparing effect, but this did ...

Cannabidiol May Benefit Patients With Early Psychosis ...

“CBD may improve the disease trajectory of individuals with early psychosis and comorbid cannabis misuse in particular—a population with currently poor ...

Effects of Cannabidiol (CBD) Versus Placebo as an Adjunct to ...

The study will examine CBD as an augmentation strategy in early psychosis. It is hypothesized that CBD will improve symptoms, neurocognition, markers of ...

Does cannabidiol reduce the adverse effects of cannabis in ...

Data from clinical trials suggest that CBD (at doses between 600 and 1000 mg) can reduce psychotic symptoms in people with schizophrenia [24,25, ...

Cannabidiol as a treatment for patients who are clinically at ...

Cannabidiol as a treatment for patients who are clinically at high risk of developing psychosis: learnings from the CANTOP-RCT.