Effectiveness of Amantadine and Propranolol for Treating Cocaine Dependence - 2

Study Overview
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Brief Summary
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Cocaine addiction is a serious health problem with no available medical treatment for preventing relapse. Amantadine, a medication that improves muscle control, and propranolol, a medication that lowers blood pressure, may be useful in treating cocaine addiction in individuals with severe cocaine withdrawal symptoms. This study will evaluate the effectiveness of amantadine and propranolol in preventing drug relapse among cocaine addicts.

Detailed Description
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Cocaine withdrawal symptoms are a major contributing factor for why outpatient cocaine dependence treatment programs often fail. Individuals with severe cocaine withdrawal symptoms often experience anxiety, shaking, and muscle pain. Amantadine is a medication currently used to improve muscle control, reduce shaking, and lessen stiffness. Therefore, it may help reduce the muscle pain that some cocaine addicts experience. By enhancing activity of the brain chemical dopamine, amantadine may also reduce other symptoms associated with cocaine withdrawal. Propranolol is a medication currently used to treat high blood pressure and irregular heart rhythms. It may reduce anxiety and lessen cocaine cravings in individuals addicted to cocaine. The purpose of this study is to evaluate the effectiveness of amantadine and propranolol, alone and in combination, for treating cocaine addicts with severe cocaine withdrawal symptoms. A 2-week baseline evaluation period will be followed by an 8-week treatment phase. During the baseline evaluation, cocaine use will be measured with urine tests, three times each week. Only participants who are experiencing severe withdrawal symptoms and who use cocaine at least twice during the first 2 weeks will continue in the study. Eligible individuals will then be randomly assigned to receive amantadine alone, propranolol alone, a combination of amantadine and propranolol, or placebo. Treatments will begin at Week 3 and study visits will occur three times each week. Cocaine levels will be monitored throughout the study with urine tests.

Official Title
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A Double-Blind, Placebo Controlled Trial of Propranolol and Amantadine for the Treatment of Cocaine Dependent Subjects With Severe Cocaine Withdrawal Symptoms

Conditions
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Cocaine-Related Disorders

Intervention / Treatment
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* Drug: Propranolol
* Drug: Amantadine
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male and females, 18 to 60 years old. Meets DSM-IV diagnosis criteria for cocaine dependence as determined by the Structured Clinical Interview for DSM-IV (SCID) Score of at least (> or =) 22 on the Initial Cocaine Selective Severity Assessment (CSSA) Lives within commuting distance of the Treatment Research Center (TRC) and the Penn/VA Center for Studies of Addiction, University of Pennsylvania If female, willing to use contraception throughout the study Continued use of cocaine during a two week evaluation phase prior to medication treatment as demonstrated by at least 2 new uses of cocaine documented by quantitative urine toxicology screen obtained three times weekly according to new use rules Exclusion Criteria: Meets DSM-IV/SCID diagnosis criteria for dependence on any drugs other than cocaine, marijuana, or nicotine. Cocaine dependent subjects who identify cocaine dependence as their primary addiction but who also meet criteria for alcohol dependence will be accepted as long as the alcohol dependence is not severe enough to require medications for alcohol detoxification. Concomitant treatment with psychotropic medications. Patients mandated to treatment based upon a legal decision or as a condition of employment. This will be assessed by the patient's self-report. Current severe psychiatric symptoms (e.g., psychosis, dementia, suicidal or homicidal ideation, mania or depression requiring antidepressant medication) Sensitivity to propranolol or amantadine Use of any investigational medication within the past 30 days. History of significant heart disease (an arrhythmia which required medication, Wolff-Parkinson -White Syndrome, angina pectoris, documented history of myocardial infarction, heart failure). History of chest pain associated with cocaine use which has prompted a visit to a physician. Current use of reserpine, verapamil, theophylline, trimethoprim, cimetidine, haloperidol, benzodiazepines, or anticonvulsants Bronchospastic disease Hyperthyroidism Diabetes mellitus Patients with known AIDS or other serious illnesses which may require hospitalization during the study. Female subjects who are pregnant or lactating, or female subjects of child bearing potential who are not using acceptable methods of birth control. Acceptable methods of birth control include: barrier (diaphragm or condom) with spermicide intrauterine progesterone contraceptive system levonorgestrel implant medroxyprogesterone acetate contraceptive injection oral contraceptives. Patients with impaired renal function as indicated by corrected creatinine clearance below 80 ml/min/70 kg as determined by the modified Cockcroft equation (CDC, 1986). Clinical laboratory tests (CBC, blood chemistries, urinalysis) outside normal limits that are clinically unacceptable to the Principal Investigator. EKG 1st degree heart block, sinus tachycardia, left axis deviation, and nonspecific ST or T wave changes are allowed; liver function tests [LFTs] <5 x ULN are acceptable). A complete list of exclusionary lab results are included in the appendix 1

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Propranolol<br>Propranolol 100mg/day in 3 divided doses | Drug: Propranolol<br>* Propranolol 100mg/day in 3 divided doses<br>|
| Experimental: Amantadine<br>Amantadine 100mg three times daily | Drug: Amantadine<br>* Amantadine 100mg three times daily<br>|
| Experimental: Propranolol and Amantadine<br>Propranolol 100mg/day in 3 divided doses and Amantadine 100mg 3X's daily | Drug: Propranolol<br>* Propranolol 100mg/day in 3 divided doses<br>Drug: Amantadine<br>* Amantadine 100mg three times daily<br>|
| Placebo Comparator: Placebo<br>Identical Placebo pills | Drug: Placebo<br>* Placebo pills<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Cocaine abstinence; measured by self-reported Time line follow-back and confirmed with cocaine urine tests. |  | 8 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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cocaine