The goal of this study is to compared [C-11]NOP-1A binding in recently abstinent cocaine use disorders and controls.

This will allow for understanding brain stress and anti-stress mechanisms that underlie abuse of cocaine in humans.

[A]Cocaine use disorders

Inclusion criteria:

1. Males or Females 18-50
2. Fulfill DSM-5 Diagnosis for Cocaine use disorder
3. Medically Healthy

Major exclusion criteria:

1. Pregnancy or lactation
2. Comorbid medical, psychiatric, drug use disorders (other than cocaine, tobacco use, and recreational marijuana/alcohol use)
3. Metal implants or paramagnetic objects contained within the body which may interfere with the MRI scan
4. Currently employed as radiation worker; or participation in radioactive drug research protocols within the previous year
5. Currently on any psychotropic medications that can influence nociceptin transmission in the brain (e.g., morphine, suboxone, SSRIs, etc.)

[B] Healthy controls

Inclusion criteria:

1. Males or Females 18-50
2. Absence of present or past psychiatric conditions (including alcohol or drug use disorders)
3. A negative urine drug screen
4. Medically Healthy

Major exclusion criteria

1. Pregnancy or lactation
2. Medical, psychiatric or drug & alcohol use disorders
3. Metal implants or paramagnetic objects contained within the body which may interfere with the MRI scan
4. Currently employed as radiation worker; or participation in radioactive drug research protocols within the previous year
5. Currently on any psychotropic medications that can influence nociceptin transmission in the brain
6. Family history of a psychotic disorder, manic episode, drug use disorders in first-degree relatives.