Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Using ketamine to treat obsessive-compulsive disorder

Official title: Ketamine Therapy in Obsessive-compulsive Disorder and Its Effects on Neuropsychological Function Under Stress in a Cross-over Trial

Run by Medical University of Vienna · NCT05577585 · Data updated 2026-11-12

This study is testing if low-dose ketamine can help people with obsessive-compulsive disorder feel better by comparing it to another treatment.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment60 (estimated)
SponsorMedical University of Vienna
Academic / other
Locations1 site (Vienna, State of Vienna)
StatusRecruiting
StartedOctober 1, 2022
Main results expectedJune 2026
Study endsJune 2026
Registry record updatedJune 25, 2025
Trial IDNCT05577585 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults with a primary diagnosis of obsessive-compulsive disorder who have previously undergone treatment for their condition.

Probably not a fit

Patients with current or past psychotic disorders, severe personality disorders, or unstable medical conditions 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 trial aims to evaluate the effectiveness of low-dose ketamine in alleviating symptoms of obsessive-compulsive disorder (OCD). It employs a randomized, double-blind, comparator-controlled cross-over design involving 30 participants diagnosed with OCD. Participants will receive ketamine and a comparator infusion in either inpatient or outpatient settings, while their neurocognitive function and stress responses will be assessed through various tasks. An option for open-label follow-up with additional infusions is also available for participants.

Why it matters

Potential benefit: If successful, this treatment could provide rapid relief from OCD symptoms and potentially sustain its effects for several days after a single infusion.

How similar studies have gone: Other studies have shown promising results with ketamine for various psychiatric disorders, indicating potential for success in this novel application for OCD.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Primary diagnosis of obsessive-compulsive disorder
* A score of 16 or higher on the Yale-Brown Obsessive Compulsive Scale and ability to provide written informed consent
* At least one previous treatment for OCD

Exclusion Criteria Experimental Group:

* Any history of current or past psychotic disorder
* A manic episode within the preceding three years
* Current or unstable remitted substance abuse or dependence except nicotine
* Pregnancy or elevated risk of becoming pregnant during study duration (desire to have children) and refusal to utilize a proper method of contraception
* Any current severe personality disorder except comorbid anankastic personality disorder
* Morbus Raynaud
* Inability to follow the study protocol or adhere to operational requirements
* Current and unstable suicidality
* Unstable hypertension
* Untreated hyperthyroidism
* Any unstable cardiovascular disease
* Untreated disorders severely affecting the HPA-axis (M.Addison, M.Cushing)
* Current pharmacological therapy severely affecting the HPA-axis like corticosteroids or ACTH

Exclusion Criteria Treatment as Usual Group:

* Any history of current or past psychotic disorder
* A manic episode within the preceding three years
* Current or unstable remitted substance abuse or dependence except nicotine
* Any current severe personality disorder except comorbid anankastic personality disorder
* Current and unstable suicidality

Where it's running

  • Medical University of Vienna, Department of Psychiatry and Psychotherapy
    Vienna, State of Vienna, Austria
    Recruiting

Study contacts

  • Principal investigator: Christoph Kraus, MD PhD — Medical University of Vienna, Department of Psychiatry and Psychotherapy
  • Study coordinator: Christoph Kraus, MD PhD
  • Email: christoph.kraus@muv.ac.at
  • Phone: +4314040035680

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.