A controlled trial of buprenorphine treatment for opium dependence: the first experience from Iran

To evaluate the effect of a 4 mg/day sublingual dose of buprenorphine in the maintenance treatment of opium dependence in comparison with a 1 mg/day dose over an 18-week treatment period. As a secondary objective, the results were determined concurrently for subjects treated with a 2 mg/day dose.

Subjects were assigned randomly to three dosage groups.

330 consecutive (320 men and 10 women) opium addicts who met the DSM-IV criteria for opioid dependence and were seeking treatment.

Subjects received a 1, 2 or 4 mg/day dose of buprenorphine and were treated in an outpatient clinic where they also received a weekly 1-hour clinical counseling session.

Addiction Severity Index, retention in treatment, and illegal opioid use as determined by random urine testing.

The mean age was 37.5 years (SD=11.4, range 19-72). Overall, 194 (58.8%) of the patients completed the 18 week study. Completion rates by dosage groups were 47.3% for the 1 mg group, 58.2% for the 2 mg group and 70.9% for the 4 mg group (chi(2)=12.7, df=2, P=0.0017).

The results support the efficacy and safety of buprenorphine for opium addiction and suggest that an adequate dose of buprenorphine would help to increase the success rate.