Psilocybin-assisted psychotherapy for severe OCD
Official title: Open Label, Phase 2 Study for Evaluating the Feasibility, Safety and Efficacy of Psychotherapy Assisted Psilocybin for Treatment of Severe Obsessive Compulsive Disorder (OCD) in Drug and/or Psychotherapy Resistant Patients.
Run by Beersheva Mental Health Center · NCT04882839 · Data updated 2026-11-12
This study is testing whether combining therapy with psilocybin can help people with severe OCD who haven't found relief from regular treatments.
Quick facts
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 15 (estimated) |
| Sponsor | Beersheva Mental Health Center Government |
| Locations | 1 site (Beersheba) |
| Status | Recruiting |
| Started | November 25, 2024 |
| Main results expected | June 1, 2026 |
| Study ends | June 1, 2027 |
| Registry record updated | November 19, 2025 |
| Trial ID | NCT04882839 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults aged 18 to 65 with a DSM-5 diagnosis of OCD who have not responded to standard treatments.
✕Probably not a fit
Patients who have not been diagnosed with OCD or those who have not failed previous treatment options 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 feasibility, safety, and efficacy of using psychotherapy combined with psilocybin to treat severe obsessive-compulsive disorder (OCD). It aims to provide an alternative treatment option for patients who have not responded to traditional therapies. The study involves 15 therapeutic sessions, focusing on the potential benefits of psilocybin in reducing OCD symptoms. Previous research has indicated that psilocybin may effectively alleviate anxiety and depression, making it a promising candidate for OCD treatment.
Why it matters
Potential benefit: If successful, this approach could offer a new, effective treatment option for patients suffering from severe OCD.
How similar studies have gone: While only one previous study has evaluated psilocybin for OCD, other studies have shown promising results for psilocybin in treating anxiety and depression.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * 1\. DSM-5 diagnosis of OCD established by a trained clinician interview and confirmed by Mini International Neuropsychiatric Interview MINI (edition 7). 2\. Y-BOCS score of 16 or greater at evaluation 3. Treatment resistant- Patients; must have failed at least one medication and/or therapy trial of standard care treatment for OCD. 4\. Age: 18 Years to 65 Years 5. Has been off selective serotonin inhibitors for five half-lives of the drug plus 2 weeks. 6\. Must avoid starting new psychotherapy or psychiatric (medical) treatment during the study, without consulting the study team. 7\. Are willing to refrain from taking any psychiatric medications or recreational drugs during the study period. 8\. Must have a negative pregnancy test at study entry and prior to each experiential/ psychedelic session, if able to bear children, and must agree to use adequate birth control. 9\. Must be willing to sign a medical release form for the investigators to communicate directly with their therapist and doctors to confirm a medication and/or medical history. This is decided on a case by case basis upon the discretion of the PI. 10\. Must provide a contact (relative, spouse, close friend, or other caregiver) who is willing and able to be reached by the Clinical Investigators in the event of a participant becoming suicidal or any another relevant reason. 11\. Are willing to commit to medication dosing, experiential/ psychedelic sessions, psychotherapy and follow-up sessions and to complete the full evaluation. Exclusion Criteria: * 1\. Personal or immediate family history of schizophrenia, bipolar affective disorder, delusion disorder, paranoid disorder, or schizoaffective disorder. 2\. Current (or last 12-month) substance abuse disorder. 3. Unstable neurological or medical condition. 4. Active suicidal intent or last 12-month suicidal attempt. 5. A history of violence, self-harm, or harm to another. 6. Any unstable medical condition that may render study procedures unsafe. 7. Positive urine pregnancy test at the time of screening. 8. Any use of psychedelic drugs within the prior 12 months. 9. Lack of ability to sign Informed consent. Exclusion Criteria during the study 1. Any unusual reaction to any of the study procedures. 2. A participant's request to stop his/ her participation in the study. 3. Positive pregnancy test at any stage prior to the last psychedelic session
Where it's running
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Beer Sheva Mental Health Center
Beersheba, Israel Recruiting
Study contacts
- Principal investigator: Oded Arbel, MD — Beersheva Mental Health Center
- Study coordinator: Oded Arbel, Dr.
- Email: oded.arbel@gmail.com
- Phone: +972506576691
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Low-intensity focused ultrasound targeting the subthalamic nucleus for OCD
A short test is being done to see if a wearable, non-invasive ultrasound device can safely and tolerably help adults with OCD by targeting a brain region called the subthalamic nucleus.
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Mindfulness-Based Cognitive Therapy for OCD Delivered Online
This study tests a synchronous online MBCT program for adults with OCD to see if it is acceptable and feasible and to explore links between biological markers, OCD severity, and treatment response.
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Targeted brain stimulation for OCD: test of tTIS on nucleus accumbens
This study tests whether targeted temporal interference stimulation of the nucleus accumbens can help reduce obsessive-compulsive symptoms in adults with OCD, compared with sham stimulation.
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Anxiety Skills Study: See if video skill training plus therapy helps people with anxiety
This study tests whether a brief video-based skill training can help people with anxiety as well as four therapy sessions, and how durable the effects are over a year.
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AttunE LIFU for OCD: a non-invasive brain stimulation study
This trial tests ATTN201, a wearable ultrasound headband, to see if it helps adults with OCD compared to a sham treatment.
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Combined ERP and Habit Reversal Therapy for Tourettic OCD
This study tests whether a merged Exposure and Response Prevention and Habit Reversal Therapy helps adults with Tourettic OCD more than either therapy alone or basic psychoeducation.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.