Managing Alcoholism in People Who Do Not Respond to Naltrexone (EXTEND)

University of Pennsylvania

Status and phase: Completed; Phase 4

Conditions: Alcoholism

Treatments: Drug: Naltrexone; Behavioral: Combined Behavioral Intervention (CBI); Behavioral: Telephone Counseling; Behavioral: Medication Management (MM); Drug: placebo

Study type: Interventional

Funder types: Other

Identifiers

NCT00115037

NIAAAOSL014851, 708534

Details and patient eligibility

About

This is a study involving treatment for alcohol dependence (alcoholism). The study will combine motivational enhancement therapy and cognitive behavioral therapy (combined behavioral intervention, or CBI) and tests the benefits of continued/discontinued treatment with naltrexone in a randomized placebo-controlled trial. CBI may have advantages in motivating patients to greater medication adherence and may address psychosocial factors that may limit the effects of naltrexone.

Full description

Naltrexone has been established as an efficacious medication to treat alcohol dependence but studies thus far have focused mostly on the acute phase of treatment rather than long-term management and have not offered alternative treatment strategies when patients do not respond to an initial course of naltrexone. For these initial non-responders to naltrexone, it is unclear what adjustments to treatment should be made to increase the likelihood of treatment success. We are unaware of previous research focused specifically on naltrexone non-response. Pilot data from ongoing trials at our center, however, suggest that up to a third of patients fail to respond to naltrexone. Moreover, these non-responsive patients go on to have the worst outcomes during the next 6 months of treatment if maintained on the same combination of naltrexone and medication management (MM). We propose to augment medication management with a combination of motivational enhancement therapy and cognitive behavioral therapy (combined behavioral intervention - CBI) and to test the benefits of continued/discontinued treatment with naltrexone in a randomized placebo-controlled trial. Clinical strategies for second line treatments often favor switching treatments rather than augmentation. However, there may be synergies between naltrexone and CBI that were not apparent with medication management. Specifically, CBI may have advantages in motivating patients to greater medication adherence (a leading cause of naltrexone treatment failure) and CBI may address psychosocial factors that limited or attenuated the effects of naltrexone.

Enrollment: 302 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• 18 years of age or older
• Current DSM-IV diagnosis of alcohol dependence using the MINI.
• Meets the following drinking criteria as measured by the Timeline Followback (TLFB): * drank within 30 days of randomization; * reports a minimum of 48 standard alcoholic drinks (avg. 12 drinks/wk.) in a consecutive 30-day period over the 90-day period prior to intake; and * has 2 or more days of heavy drinking (defined as over 5 drinks per day in males and over 4 drinks per day in females) in this same pre-treatment period, prior to intake.
• Prior to starting NTX, scores below 8 on the Clinical Inventory of Withdrawal from Alcohol (CIWA), and at least 3 consecutive days of abstinence (2 days abstinence will be permitted with approval by the principal investigator) directly prior to randomization, as determined by Subject report and breathalyzer measures
• Speaks, understands and prints in English.

Exclusion criteria

• Has abused or been dependent on opiates in the past 12 months, or evidence of opiate use in month prior to treatment, as assessed by subject report and intake urine drug screen. Use of prescription opioids prior to treatment entry is allowed at the discretion of the investigator. However, subjects must be free from use at the time of randomization.
• Meets DSM IV criteria for current dependence, abuse, or dependence in partial remission on any substance other than alcohol (except nicotine and marijuana). Subjects who test positive on the urine drug screen (with the exception of THC) at the initial visit (a repeat UDSis permitted in cases that are not clear. The repeat UDS should be at least 5 days after the initial test)
• Has a lifetime DSM-IV diagnosis of schizophrenia or any psychotic disorder. Has a current DSM-IV diagnosis of post-traumatic stress disorder (PTST) or bipolar disorder, or any disorder that may interfere with study participation, at the discretion of the investigator.
• Hepatocellular disease indicated by elevations of SGPT (ALT) and SGOT (AST) of at least 5 times normal, or elevated bilirubin (of 1.3 or higher), as evidenced by the most recent lab results prior to randomization. (documentation of Gilberts syndrome will not constitute an exclusion despite elevated bilirubin).
• Has evidence of significant hematological, pulmonary, endocrine, cardiovascular, renal or gastrointestinal disease that the principal investigator considers a risk to participation.
• Has taken any psychotropic medications (or disulfiram) regularly within the last seven days prior to randomization or needs immediate treatment with a psychotropic medication (with the exception of detoxification medications or benadryl used sparingly for sleep). The required washout period for fluoxetine (Prozac®) is 14 days prior to randomization, and the required washout period for other psychotropic medications is 7 days prior to randomization.
• Has taken any detoxification medication on the day of randomization.
• Tests positive on a pregnancy test, is contemplating pregnancy in the next 12 months, is nursing, or is not using an effective contraceptive method if the subject is of child-bearing potential.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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302 participants in 6 patient groups, including a placebo group

Phase 1 Liberal Response

Experimental group

Description:

From the start of baseline subjects were randomly assigned to this arm which defined relapse/non-responder as having 5 or heavy drinking days in the first 8 weeks of treatment otherwise the subject was considered a responder.

Treatment:

Drug: Naltrexone

Phase 1 Stringent Response

Experimental group

Description:

From the start of baseline subjects were randomly assigned to this arm which defined relapse/non-responder as having 2 or heavy drinking days in the first 8 weeks of treatment otherwise the subject was considered a responder.

Treatment:

Drug: Naltrexone

Phase 2 nalt and tele for responders

Experimental group

Description:

Phase 2: Naltrexone and telephone counseling for responders.

Treatment:

Behavioral: Telephone Counseling

Drug: Naltrexone

Phase 2 nalt, MM and CBI for NR

Experimental group

Description:

Phase 2: naltrexone, Medication Management (MM) and Combined Behavioral Intervention (CBI) for non-responders (NR).

Treatment:

Behavioral: Medication Management (MM)

Behavioral: Combined Behavioral Intervention (CBI)

Drug: Naltrexone

Phase 2 placebo, MM and CBI for NR

Placebo Comparator group

Description:

Phase 2: placebo, Medication Management (MM) and Combined Behavioral Intervention (CBI) for non-responders (NR)

Treatment:

Drug: placebo

Behavioral: Medication Management (MM)

Behavioral: Combined Behavioral Intervention (CBI)

Phase 2 naltrexone for responders

Experimental group

Description:

Phase 2: Naltrexone and TAU for phase 1 responders.

Treatment:

Drug: Naltrexone