This trial is active, not recruiting.

Condition cocaine dependence
Treatments mifepristone, placebo
Phase phase 2/phase 3
Sponsor New York State Psychiatric Institute
Start date May 2010
End date December 2015
Trial size 80 participants
Trial identifier NCT01134198, 6013, RU486 for Cocaine Dependence


This research will evaluate the impact of blocking central and peripheral glucocorticoid receptors on stress sensitivity and the risk of relapse to cocaine use in treatment-seeking cocaine-dependent individuals. Mifepristone (RU-486) will be the glucocorticoid antagonist used.

United States No locations recruiting
Other Countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification safety/efficacy study
Intervention model parallel assignment
Masking double blind (subject, investigator, outcomes assessor)
Primary purpose treatment
(Active Comparator)
Mifepristone 600mg
mifepristone RU486
Mifepristone 600mg, 3x/wk for 4 weeks
(Placebo Comparator)
placebo placebo

Primary Outcomes

Days to relapse
time frame: number of days during 8 weeks

Eligibility Criteria

Male participants from 18 years up to 60 years old.

Inclusion Criteria: 1. Age 18 to 60. 2. Male. 3. Meets DSM?IV criteria for current cocaine dependence and is seeking treatment. 4. Identifies life stress (work, interpersonal, financial, etc) as a trigger for cocaine use or reports uncontrollable craving to use of cocaine. 5. Displays at least one cocaine-positive urine toxicology during screening. 6. Uses cocaine at least 4/30 days in the past month, or reports episodic binges of large amounts of cocaine (at least $200) at least 2x/month. 7. Able to give informed consent and comply with study procedures. Exclusion Criteria: 1. Meets DSM-IV criteria for major depression, bipolar disorder, schizophrenia or any psychotic disorder other than transient psychosis due to drug abuse. Substance Induced Mood Disorder with Hamilton Depression Scale score ³13 will be excluded. 2. History of seizures in the last 2 years, or history of seizures related to the substance (cocaine, alcohol, or benzodiazepine) that the patient continues to use. 3. History of allergic, dermatological, or adverse event to mifepristone 4. Chronic organic mental disorder, insufficient proficiency in English that would render an individual incapable of giving informed consent. 5. Significant current suicidal risks, history of significant suicidal behavior or any suicide attempt within the past year. 6. Unstable physical disorders, which might make participation hazardous such as hypertension (>140/90), WBC < 3.5, new diagnosis of hepatitis (patients with chronic mildly elevated transaminase levels (£2-3 X upper limit of normal will be considered acceptable if PT/PTT is normal), renal failure (creat > 2; BUN > 40), or diabetes (HbA1c > 7%), and low Hb (< 12g/dL) or low Hct (<36%). 7. Coronary vascular disease as indicated by history, or suspected by abnormal ECG or history of cardiac symptoms. Hx of cardiac symptoms (chest pain, chest pressure, shortness of breath, syncope) during cocaine use. 8. Cardiac conduction system disease as indicated by QRS duration of ³ 0.11 msec. 9. Currently meets DSM-IV criteria for another substance dependence or abuse disorder other than nicotine, alcohol, or cannabis. If alcohol dependent, must not be in need of detoxification. Heavy male drinkers (who consume greater than 5 standard alcoholic drink per day per NIAAA definition) will be excluded. 10. Presents with metabolic indicators of hypoadrenalism such as low serum sodium (<130 mEq/L), high serum potassium (>5.5 mEq/L), Na/K ratio < 30:1, low fasting blood sugar (<50 mg/dL), or high BUN (>20 mg/dL), or a previous history of Addison's disease or adrenal insufficiency, or the presence of low K (< 3.5 mEq/L). spot AM cortisol <5ug/dL, PM cortisol < 3 ug/dL 11. Participants who cannot comply with study procedures during the initial hospitalization phase. 12. Supplemental exclusion criteria for cold pressor test (CPT): history of frostbite, open cut or sore on foot to be immersed, history of Raynaud's phenomenon. During the testing, if sBP > 190 or dBP > 120, or HR > 160, the test will be interrupted. A second occurrence of these values will stop all further CPT. 13: Patients taking medications metabolized by cytochrome 3A4 (ex: erythromycin, protease inhibitors) or that inhibit this cytochrome; or consuming grapefruit juice. 14: Patients with an underlying hemorrhagic disorder and those on anti-coagulants. INR > 1.1, PT > 17 msecs, total plt <100x109/L. 15: Use of treatment agents that inhibit steroid biosynthesis by the adrenal cortex, such as metyrapone, ketoconazole, fluconazole, aminoglutethimide, or etomidate. Patients also requiring inhaled steroids. 16. Female

Additional Information

Official title Investigation of the Effects of Mifepristone (RU486) on Stress Sensitivity and Relapse Prevention in Cocaine Dependent Patients
Principal investigator Wilfid N Raby, Md, PhD
Description This study attempts to reduce relapse risk by blocking glucocorticoid receptors, and thus allow some of the changes in the brain caused by cocaine to redress themselves
Trial information was received from ClinicalTrials.gov and was last updated in August 2015.
Information provided to ClinicalTrials.gov by New York State Psychiatric Institute.