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[Opioid maintenance treatment and Cannabis use].

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.