[Opioid maintenance treatment and Cannabis use]. / Opioidsubstitutionsbehandlung und Cannabiskonsum.

OBJECTIVES: More than 30 % of patients participating in an opioid maintenance program consume cannabis. This article describes the effects of additional cannabis use during an opioid maintenance treatment program. METHODS: Narrative literature research using online publication databases (MedLine, PubMed) RESULTS: The additional use of cannabis during an opioid maintenance treatment program may have negative side effects. CONCLUSION: Cannabis use should be discussed with the patient. It is in principle not a reason for discontinuing an opioid maintenance treatment program.