Phase 2 PTSD Trial, Recruiting
Who may be able to join
AI generated eligibility summary. Written by an AI model from the official source data and checked on a sample basis. It can contain mistakes, so confirm anything important against the original source. How we use AI
Who might be able to join this trial:
- People who are able to provide proof of their veteran status.
- People who speak and read English fluently.
- People who, at the start of the study, meet the clinical criteria for Alcohol Use Disorder, as measured by a structured diagnostic interview called the SCID-5.
- People who are able to safely stop drinking alcohol for at least 48 hours without needing medical detox.
- People who, at the start of the study, have been diagnosed with PTSD (under current diagnostic guidelines) with symptoms lasting at least 6 months.
- People who, at the start of the study, score 33 or higher on a standard PTSD symptom checklist called the PCL-5.
- People who, at the start of the study, have a confirmed PTSD diagnosis based on a clinical interview called the CAPS-5, with a total severity score of 28 or higher.
- People who are able to swallow pills.
- People who agree to have their study visits recorded, including therapy sessions and assessments.
- People who can provide a contact person (such as a relative, spouse, close friend, or other support person) who is willing to be reached by the research team if the participant becomes unwell or unreachable.
- People who can identify a suitable support person to stay with them on the evenings following the experimental sessions.
- People who weigh at least 45 kilograms. People weighing between 45 and 48 kilograms must also have a body mass index (BMI) between 18 and 30.
- People assigned female sex at birth who are not pregnant, not planning to become pregnant, and not breastfeeding — and who either cannot become pregnant, or are using a highly effective form of contraception (with a failure rate of less than 1%). A negative pregnancy test at study entry and before each experimental session is also required.
- People who are able to give informed consent and agree to follow all study requirements.
- People who agree to inform the research team within 48 hours of any new medical conditions or procedures.
- People who have asymptomatic Hepatitis C that has previously been assessed and treated as needed.
- People who have a realistic, agreed-upon plan (approved by the investigator, therapy team, and study doctor) to reduce substance use and manage symptoms without self-medicating.
- People with a history of or current Type 2 Diabetes, if tests rule out underlying heart disease, the condition is stable and well managed, and the study doctor approves.
- People with an underactive thyroid (hypothyroidism), if they are on stable and adequate thyroid medication.
- People with a history of or current glaucoma, if an eye specialist (ophthalmologist) approves their participation.
Who may not be able to join:
- People with symptomatic liver disease or significantly elevated liver enzyme levels on blood tests.
- People with current unstable liver or bile duct disease, such as fluid in the abdomen, confusion related to liver disease, abnormal clotting, jaundice, or cirrhosis.
- People with a history of seizures or severe alcohol withdrawal (delirium tremens).
- People currently showing significant alcohol withdrawal symptoms, as measured by a clinical assessment tool.
- People with a recent history of clinically significant low sodium levels or dangerously high body temperature.
- People with a significantly prolonged heart rhythm measurement (QTcF interval above 450 ms) on repeated ECG tests (confirm with trial site for details on exceptions).
- People with a history of any medical condition that could make receiving a drug that raises blood pressure and heart rate unsafe — including heart attack, stroke, heart failure, severe coronary artery disease, or aneurysm.
- People with controlled or uncontrolled high blood pressure (readings of 140 mmHg systolic or higher, or 90 mmHg diastolic or higher, on repeated measurements).
- People with a history of serious abnormal heart rhythms (ventricular arrhythmia), other than occasional minor irregularities in the absence of heart disease.
- People with Wolff-Parkinson-White syndrome or any other extra electrical pathway in the heart that has not been successfully treated.
- People with a history of abnormal heart rhythms (other than minor irregularities) within the 12 months before screening, unless successfully treated as specified in the protocol.
- People with additional risk factors for a specific dangerous heart rhythm condition called Torsade de pointes (such as heart failure, low potassium, or a family history of Long QT Syndrome).
- People who cannot have an MRI due to non-removable metal implants, claustrophobia, or a history of head trauma.
- People who have started a new form of mental health treatment within 12 weeks before enrolment, including electroconvulsive therapy (ECT) or ketamine-assisted therapy.
- People currently prescribed antidepressant medications (such as SSRIs) that would require a gradual taper before starting the study (confirm with trial site, as tapering off SSRIs before study procedures may be possible).
- People currently prescribed antipsychotic medications.
- People who, in the investigator's opinion, are likely to be re-exposed to the trauma that caused their PTSD, or another serious trauma, during the study.
- People with a current moderate or severe cannabis use disorder (as defined by specific diagnostic criteria) within the 12 months before enrolment.
- People with an active disorder related to use of any other substance (other than cannabis or alcohol) within the 12 months before enrolment.
- People who have used Ecstasy (a substance sold as MDMA) more than 10 times in the past 10 years, or at least once within 6 months of the first experimental session.
- People who currently present a serious risk of suicide, as assessed through clinical interview, a standardised questionnaire, and the investigator's clinical judgement — including those with frequent or intense suicidal thoughts, or any suicidal behaviour, in the past 6 months.
- People who would present a serious risk of harm to others, as determined through clinical interview and contact with a treating psychiatrist.
- People who currently require ongoing psychiatric medication (with some exceptions outlined in the study protocol — confirm with trial site).
- People currently taking medications used to treat alcohol use, such as naltrexone or disulfiram.
- People who need to take medications during experimental sessions that could prolong the QT interval (a heart rhythm measurement).
- People currently receiving trauma-focused psychotherapy or enrolled in a treatment programme for substance use disorders (self-help programmes are not an exclusion).
- People currently enrolled in another clinical study involving an investigational treatment, unless approved by the study doctor.
- People with a history of or current primary psychotic disorder, Bipolar I disorder, or dissociative identity disorder.
- People with a current eating disorder that involves compensatory behaviours (such as purging).
- People with current major depressive disorder that includes psychotic features.
- People with certain current personality disorders, as assessed through a structured clinical interview.
- People who are not able to give informed consent.
- People with known sensitivity or allergy to any of the study medications or their components.
- People currently involved in legal compensation claims where financial benefit depends on continued PTSD or other psychiatric symptoms.
- People who do not have adequate social support or a stable living situation, or who cannot identify a support person to assist them after experimental sessions.
- People who have previously taken part in an MDMA clinical trial sponsored by MAPS.
- Employees (or their immediate family members) of MAPS, MAPS Public Benefit Corporation, or MAPS Europe B.V., or people in a personal relationship with the lead investigator.
- People with any other current issue that, in the opinion of the investigator or study doctor, might interfere with participation.
Important: Always verify eligibility with the trial site directly before applying.
Based on publicly available eligibility criteria from ClinicalTrials.gov. Verify directly with the trial site before acting. This is not medical advice.
Contact this trial
Phone: 401-273-7100
Contact details sourced from ClinicalTrials.gov. Verify directly with the trial site before attending.
GP referral letter
Print a one-page summary to share with your doctor.
Trial details
Where this trial is recruiting
Primary endpoints
Number of standard unit drinks form the TLFB; CAPS score reduction
Can't join this trial?
Data last synced from ClinicalTrials.gov: 22 July 2026. Trial status can change. Always verify current status directly with the trial site before making any decision.