Current Opinion in Psychology
April 1, 2021
Ian Hamilton, Harry Sumnall
This review provides the reader with an update on developments in research relating to cannabis psychosis. For over four decades researchers and clinicians have focused on the relationship between exposure to cannabis and the emergence of psychotic symptoms. This has proved to be a complicated topic to investigate but research has provided some valuable insights as to the nature of this...
Current Psychiatry Reports
June 4, 2019
Ian Hamilton, Mark Monaghan
80 citations
PURPOSE OF REVIEW: This paper provides an update from the literature on understanding of the relationship between cannabis and schizophrenia. In particular, the paper focuses on the latest findings and remaining areas that require investigation. RECENT FINDINGS: Three hypotheses have emerged as potential explanations for the association between cannabis and schizophrenia, namely cannabis can...
Addiction
September 1, 2017
Ian Hamilton
The relationship between cannabis and psychosis and schizophrenia has tested the field of addiction for decades, and in some ways serves as measure of our ability to provide a credible contribution to public health. As cannabis is used widely, many people are interested in the risks the drug poses to mental health. This paper focuses upon a seminal study examining this, the trajectory of...
Addiction
July 31, 2017
Ian Hamilton
The points made by Dr Miller 1 raise further important issues we need to consider in thinking about the relationship between cannabis and psychosis. With regard to later research, I accept that much of the research published after the millennium was not included in my original paper, as the focus was upon how work prior to this time had evolved and how well it had stood the test of time. The...
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...