For the study, Woody’s team randomly assigned 152 young people to 12 weeks of treatment with buprenorphine and naloxone, or to two weeks of treatment with the same drug combination. Patients in both groups also received individual and group counseling. …

…at 12 weeks, just 20.5 percent of the patients who received short-term drug treatment remained in treatment, compared with 70 percent of those in the extended treatment group. And, patients receiving extended treatment reported less use of opioids, cocaine and marijuana, less injecting, and less need for additional addiction treatment. …

Extended Therapy Helps Drug-Addicted Teens – washingtonpost.com