Combined Treatment for Cocaine-Alcohol Dependence - 1

This is a randomized, double blind placebo-controlled trial to examine the role of Relapse
Prevention (RP) and Contingency Management (CMP) combined with Naltrexone (NTX) for the
treatment of cocaine-alcohol dependence. Patients will be randomly assigned to NTX (100mg/d)
or placebo combined with one of two psychotherapy conditions (RP or RP +CMP). Following a
standardized consent and intake procedure patients will participate in a 12-week trial with
thrice weekly visits. Manual-guided RP therapy will be delivered in weekly 60-minute
individual sessions. CMP will be based on cocaine-negative urine screens and negative breath
alcohol tests. Follow-up assessments will be conducted at 3 and 6 months after treatment.

Inclusion Criteria:

- Give informed consent

- Be able to understand the nature of the study, agree to comply with study
requirements, report regularly for scheduled visits, and communicate with study
personnel about adverse events and concomitant medication use

- Be between 18 and 60 years old

- Meet DSM-IV criteria for both current cocaine and alcohol dependence

- Be in acceptable health based on physical exam, lab tests, and EKG

- Have a stable living situation and the availability of at least two locators

- Be able to read and write English at the 6th grade level

- Provide a least one cocaine positive urine during intake

- If female, must agree to use contraception

Exclusion Criteria:

- History of evidence of a medical condition that would expose them to an undue risk or
interfere with assessments during the course of the trial, including but not limited
to hepatic, renal, respiratory, cardiovascular, endocrine, or neurologic disease as
determined by the clinical judgment of the research team

- Medical condition that is contraindicated with opioid antagonists or necessitates
opiate medication

- Abnormal liver function test results (both ALT and AST >3x upper limit normal or
either >5x upper limit normal)

- Currently in treatment or have received treatment in the past six months for
substance abuse or another psychiatric condition

- Evidence of a Axis I disorder that will interfere with the course of the trial,
including but not limited to current Major Depressive Disorder, Bipolar Disorder,
Panic Disorder, Schizophrenia, Bulimia nervosa or Anorexia, and Post-traumatic stress
disorder as determined by the clinical judgment of the research team

- Participating in 12 step meetings more than twice weekly

- Opiate abuse or dependence in the last five years or used opiates, barbiturates,
benzodiazepines in the last thirty days

- Current dependence on any psychoactive disorder other than nicotine

- Impending incarceration

- Condition of probation or parole requiring reports of drug use to officers of the
court

- Women of child bearing potential must not be pregnant/lactating or unwilling to use
an acceptable contraceptive method

- Plans to move from the Houston area within the next three months