 Only limited information on the process of completing long-term opiate substitution treatment OST with substances like methadone exist. Furthermore, systematic knowledge from scientific studies is scarce, there are only few studies with respect to treatment completion or regular termination mainly catamnestic analyses. Studies by Nordt et al. 2004 or Nordt Stohler 2006 show an estimated rate of 10 of patients per year who terminate OST by means of tapering the substitution agent or changing into withdrawal treatment in specialized clinics. It is state of the art that an indication for termination of OST has to be based on a common agreement between the patient and the doctor. Furthermore, the patient should live in a stable social situation and the state of health had markedly improved. Finally, the patient has to be free of illegal drug use for at least 6 months and the individual aims of treatment should have been reached Vader et al. 2003. 