RESUMO
To evaluate the effectiveness of relapse prevention cognitive-behavioral model, based on Marlatt treatment approach, in Opioid-dependent patients participating in the Methadone Maintenance Treatment [MMT] in Iran. The study consisted of 92 individuals treated with methadone in Iranian National Center of Addiction Studies [INCAS]. Participatns were randomized into two groups: educational intervention group [N=46] and control group [N=46]. The intervention was comprised of 10 weekly 90 minute sessions, done during a period of 2.5 months based on the most high risk situations determined using Inventory Drug Taking Situation instruments. Relapse was defined as not showing up for MMT, drug use for at least 5 continuous days, and a positive urinary morphine test. While, only 36.4% of the intervention group relapsed into drug use, 63.6% of the control group relapsed. The result of the logistic regressions showed that the odd ratio of the variable of intervention program for the entire follow up period was 0.43 [P<0.01]. Further, the odd ratio of this variable in one month, three months, and 195 days after the therapy were 0.48 [P<.03], 0.31 [P<.02], and 0.43 [P<.02] respectively that revealed that on average, the probability of relapse among individuals in the intervention group was lower than patients in control group. Relapse prevention model based on Marlatt treatment approach has an effective role in decreasing relapse rate. This model can be introduced as a complementary therapy in patients treated with methadone maintenance