Home Department written question – answered at on 29 June 2004.
To ask the Secretary of State for the Home Department what plans there are to repeat the longitudinal studies of cannabis smoking completed in the 1960s and 1970s to take account of the increased potency of today's cannabis.
We have no plans to replicate such studies. We rely upon the advice of the Advisory Council on the Misuse of Drugs, which is based upon a wide-ranging review of the available research. It is the council's view that there is no clear evidence that variants of cannabis with higher levels of its main psychoactive ingredient tetrahydrocannabinol (THC) cause more health problems. The council will continue to monitor the emerging international research on this issue very carefully.
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