The Commission of Inquiry into the Non-Medical Use of Drugs, often referred to as the Le Dain Commission after its chair Dean Gerald Le Dain, was a Canadian government commission that was begun in 1969 and completed its work in 1972. The report also recommended that the federal government conduct further research to monitor and evaluate changes in the extent and patterns of the use of cannabis and other drugs, and to explore possible consequences to health, and personal and social behaviour, resulting from the controlled legal distribution of cannabis.