This trial is active, not recruiting.

Condition opiate-related disorders
Treatments buprenorphine/naloxone, methadone
Phase phase 4
Sponsor National Institute on Drug Abuse (NIDA)
Collaborator University of California, Los Angeles
Start date April 2006
End date June 2010
Trial size 1250 participants
Trial identifier NCT00315341, NIDA-CTN-0027


The Food and Drug Administration (FDA) has requested a study comparing buprenorphine/naloxone (BUP/NX) and methadone (MET) on indices of hepatic safety.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification safety/efficacy study
Intervention model parallel assignment
Masking open label
Primary purpose treatment
Participants receive up to 16 mg BUP/4 mg NX on day 1 and up to 32 mg BUP/8 mg NX on day 2. It is recommended that dose changes be made in 2 to 8 mg increments, with the range of allowable daily doses between 2 mg and 32 mg starting on day 3 and thereafter according to clinical impression and depending upon the participant's clinical need.
(Active Comparator)
Participants will receive a maximum of 30 mg for the first dose and a maximum of 40 mg on Day 1. It is recommended that participants receive a dose on day 2 that is 10 mg higher than their total day 1 dose, and a dose on day 3 that is 10 mg higher than their total day 2 dose, unless, in the clinical judgment of the physician, a slower induction is needed. Doses will be adjusted on Day 4 and thereafter according to clinical impression and depending upon the participant's clinical need with no specific upper limit.

Primary Outcomes

Hepatic safety
time frame: 24 Weeks

Secondary Outcomes

Risk factors
time frame: 24 Weeks
time frame: 6 months

Eligibility Criteria

Male or female participants at least 18 years old.

Inclusion Criteria: - Age 18 years or older - Meet DSM-IV criteria for opioid dependence - In good general health, or, in case of a medical/psychiatric condition requiring ongoing treatment, be under the care of a physician willing to continue subject's medical management and cooperate with study physicians - Have blood chemistry values normal for: creatinine, direct bilirubin, albumin, and prothrombin time (INR) as per the criteria of the laboratory - Able to read and verbalize understanding and voluntarily sign the approved Informed Consent form prior to performance of any study-specific procedures. Exclusion Criteria: - ALP, AST or ALT values greater than 5 times the upper limit of normal as per the criteria of the contracted central laboratory - Ascites, GI bleeding, or other signs of significant liver disease as indicated by a Model for Endstage Liver Disease score (Kamath et al., 2001) of 11 or greater - Acute medical condition that would make participation, in the opinion of the study physician, medically hazardous (e.g., unstable pancreatic, cardiovascular or renal disease, significant anemia) - Known allergy or sensitivity to BUP, naloxone or MET or to any of the inactive ingredients in the study medications (including lactose, mannitol, cornstarch, povidone K30, citric acid, sodium citrate, FD&C Yellow No.6 color, magnesium stearate, Acesulfame K sweetener) - Known diagnosis of acute psychosis, severe depression or imminent suicide risk as determined via clinical interview by study physician or surrogates - Dependence on alcohol, benzodiazepines (dependent on clinician's judgment regarding need for immediate medical attention and likelihood of intravenous misuse) or other depressants, or stimulants that requires immediate medical attention - Participation in an investigational drug study within the past 30 days - Treatment with MET, BUP/NX, or BUP within the past 30 days (illicit use of these medications is allowed) - Pending legal action that could prohibit study participation - Unable or unwilling to comply with study requirements - Unable or unwilling to remain in the local area for duration of treatment - Poor venous access such that venipuncture could not be accomplished from a vein in an extremity during screening - Pregnant or lactating (females only)

Additional Information

Official title Starting Treatment With Agonist Replacement Therapies (START)
Principal investigator Walter Ling, M.D.
Description This is a randomized, open-label, multi-center, Phase 4 study to assess the changes in liver enzymes related to treatment with buprenorphine/naloxone (BUP/NX) and methadone (MET) in participants entering opioid agonist treatment. Randomization will be stratified, within site, according to normal versus abnormal screening liver function tests. Participants meeting entry criteria will be dosed for 24 weeks during the active phase of the study with assessment of liver function at weeks 1, 2, 4, 8, 12, 16, 20, 24 and with follow-up assessments at week 32. Clinicians will be encouraged to treat with adequate doses of BUP/NX and MET.
Trial information was received from ClinicalTrials.gov and was last updated in October 2009.
Information provided to ClinicalTrials.gov by National Institute on Drug Abuse (NIDA).