Catherine Hewitt

Effect of reclassification of cannabis on hospital admissions for cannabis psychosis: a time series analysis.

International Journal of Drug Policy January 2014 Ian Hamilton, Charlie Lloyd, Catherine Hewitt et al.

The UK Misuse of Drugs Act (1971) divided controlled drugs into three groups A, B and C, with descending criminal sanctions attached to each class. Cannabis was originally assigned by the Act to Group B but in 2004, it was transferred to the lowest risk group, Group C. Then in 2009, on the basis of increasing concerns about a link between high strength cannabis and schizophrenia, it was moved...