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COMP360 psilocybin

Phase 2

PTSD - Post Traumatic Stress Disorder | Small molecule | Psychiatry |COMPASS Pathways Plc - American Depository Shares|Last Updated: Sep 4, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment300

FDA Designations

No designations recorded

Clinical trial landscape

COMP360 psilocybin · 1 trial · 4 indications

Phase 2 1
NCT07570654Redefine Study: A Study Evaluating the Efficacy, Safety, and Tolerability of COMP360 in Participants With Post-traumatic Stress DisorderPTSD - Post Traumatic Stress Disorder
RECRUITING300 Analytics
PHASE2RECRUITING
Redefine Study: A Study Evaluating the Efficacy, Safety, and Tolerability of COMP360 in Participants With Post-traumatic Stress Disorder
PTSD - Post Traumatic Stress DisorderUnlock trial analytics

Study Endpoints

Primary Endpoints

COMP360 25 mg versus COMP360 1 mg change from Baseline to Week 8 in CAPS-5 total severity score
8 weeks

The CAPS-5 (Clinician-Administered PTSD Scale for DSM-5) is a 30-item structured interview that yields a total severity score (0-80) reflecting PTSD symptoms. A higher CAPS-5 score indicates more severe, intense, and frequent PTSD symptoms.

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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
1 mg COMP360 psilocybinACTIVE_COMPARATOR -
10 mg COMP360 psilocybinEXPERIMENTAL -
25 mg COMP360 psilocybinEXPERIMENTAL -

Interventions

NameTypeDescription
COMP360 psilocybinDRUGCOMP360 psilocybin administered with monitoring and support
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites2

Inclusion Criteria: * 18 years or older * Diagnosed with PTSD at least 6 months ago Exclusion Criteria: \- Diagnosed with certain psychiatric conditions such as bipolar disorder, schizophrenia, OCD, anorexia, or other conditions

Countries:United States
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Recent Changes (Last 90 Days)

LOWSep 4, 2026NCT07570654lastUpdatePostDate: changed
LOWAug 19, 2026NCT07570654Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 19, 2026NCT07570654Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 19, 2026NCT07570654Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about COMP360 psilocybin

What is COMP360 psilocybin used for in PTSD?

COMP360 psilocybin is an investigational small molecule being studied for the treatment of post-traumatic stress disorder (PTSD). It is currently in Phase 2 clinical development and is not yet approved by regulatory authorities. The drug is being evaluated in the Redefine Study, a randomized, double-blind, active-controlled trial.

How does COMP360 psilocybin work?

COMP360 psilocybin is a small molecule that acts as a psychedelic compound. While its exact mechanism in PTSD is under investigation, it is believed to modulate brain networks involved in emotional processing and memory. The drug is being studied for its potential to provide therapeutic benefits in PTSD, though its precise mechanism of action is not fully established.

Who is developing COMP360 psilocybin?

COMP360 psilocybin is being developed by COMPASS Pathways Plc, a biopharmaceutical company listed on the NASDAQ under the ticker symbol CMPS. The company is conducting clinical trials to evaluate the efficacy, safety, and tolerability of COMP360 in participants with post-traumatic stress disorder.

What phase is COMP360 psilocybin in?

COMP360 psilocybin is currently in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA or any other regulatory agency. The ongoing Phase 2 trial is actively recruiting participants to assess the drug's efficacy and safety in treating PTSD.

What clinical trials is COMP360 psilocybin in?

COMP360 psilocybin is being evaluated in the Redefine Study (NCT07570654), a Phase 2 trial with an enrollment of 300 participants. This randomized, double-blind, active-controlled study is recruiting in the United States and includes adults aged 18 years and older with PTSD. The trial is currently in the recruiting stage.

Is COMP360 psilocybin the same as psilocybin?

COMP360 psilocybin is a proprietary formulation of psilocybin, the active ingredient found in certain psychedelic mushrooms. It is being developed specifically by COMPASS Pathways for therapeutic use in psychiatric conditions such as PTSD. While it contains the same active compound, it is being studied as a standardized pharmaceutical product.