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PET scans reveal Cocaine's brain impact

NCT ID NCT04721418

Knowledge-focused Sponsor: Yale University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Aug 26, 2026 · Updated 2 times

Summary

This study uses PET scans with a special tracer to measure brain synapse density in 80 people—some with cocaine use disorder and some healthy controls. Researchers aim to see if cocaine changes brain connections, especially in areas linked to decision-making and addiction. Participants will be followed over time to track changes during abstinence.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
11C-UCB-J (a radioactive tracer for PET scans)
What this could lead to
If successful, this could reveal how cocaine changes brain connections, pointing toward new targets for addiction treatment.
What could go wrong
This is an early observational study, not a treatment trial. It may not find clear differences or lead directly to therapies.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 80 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2021

Expected to finish

Apr 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

One group will have current Cocaine Use Disorder, the other group will be Healthy Controls

Ages

21 to 60 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age 21-60 years * Physically healthy by medical history, physical, neurological, ECG and laboratory examinations * For females, a negative serum pregnancy test * For CUD: DSM-5 criteria for Cocaine Use Disorder and positive urine toxicology showing recent use * For HC: Negative urine toxicology Exclusion Criteria: * DSM-5 criteria for other substance use disorders (e.g., alcohol, opiates, sedative hypnotics), except for nicotine * A primary DSM-5 Axis I major psychiatric disorder (e.g., schizophrenia, bipolar disorder, major depression, etc.) as determined by the Structured Clinical Interview for DSM-5 (SCID-5) * A history of significant and/or uncontrolled medical or neurological illness * Current use of psychotropic and/or potentially psychoactive prescription medications * Medical contraindications to MRI procedure

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Conditions

The condition(s) this trial relates to.

cocaine dependence

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Cocaine use disorder Healthy controls

Contacts and locations

Locations

  • Connecticut Mental Health Center

    New Haven, Connecticut, 06519, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.