Aims This study aimed to determine the relative effectiveness of 12 months of interim methadone (IM; supervised methadone with emergency counseling only for the first 4 months of treatment), standard methadone treatment (SM; with routine counseling) and restored methadone treatment (RM: routine counseling with smaller case-loads).
Design A randomized controlled trial was conducted comparing IM, SM and RM treatment. IM lasted for 4 months, after which participants were transferred to SM.
Setting The study was conducted in two methadone treatment programs in Baltimore, MD, USA.
Participants The study included 230 adult methadone patients newly admitted through waiting-lists.
Measurements We administered the Addiction Severity Index and a supplemental questionnaire at baseline, 4 and 12 months post- baseline. Measurements included retention in treatment, self-reported days of heroin and cocaine use, criminal behavior and arrests and urine tests for heroin and cocaine metabolites.
Findings At 12 months, on an intent-to-treat basis, there were no significant differences in retention in treatment among the IM, SM and RM groups (60.6%, 54.8% and 37.0%, respectively). Positive urine tests for the three groups declined significantly from baseline (Ps < 0.001 and 0.003, for heroin and cocaine metabolites, respectively) but there were no significant group x time interactions for these measures. At least one arrest was reported by 30.6% of the sample during the year, but there were no significant between-group effects.
Conclusions Limited availability of drug counseling services should not be a barrier to providing supervised methadone to adults dependent on heroin—at least for the first 4 months of treatment.