Last updated on: 10/31/2011 | Author:

Verity C. Leeson, MD, PhD Biography

Honorary Research Associate at the University College London (UCL) Institute of Neurology
Not Clearly Pro or Con to the question "Should Marijuana Be a Medical Option?"

“Objective: Cannabis use is associated with a younger age at onset of psychosis, an indicator of poor prognosis, but better cognitive function, a positive prognostic indicator. We aimed to clarify the role of age at onset and cognition on outcomes in cannabis users with first-episode schizophrenia as well as the effect of cannabis dose and cessation of use… Conclusions: Cannabis use brings forward the onset of psychosis in people who otherwise have good prognostic features indicating that an early age at onset can be due to a toxic action of cannabis rather than an intrinsically more severe illness. Many patients abstain over time, but in those who persist, psychosis is more difficult to treat.”

“The Effect of Cannabis Use and Cognitive Reserve on Age at Onset and Psychosis Outcomes in First-Episode Schizophrenia,” Schizophrenia Bulletin, Mar. 9, 2011

Involvement and Affiliations:
  • Honorary Research Associate, University College London (UCL) Institute of Neurology, June 7, 2010-present
  • Former Clinical Trials Manager, Department of Medicine, Imperial College London
  • MD, school and date unknown
  • PhD, University of Hertfordshire, 2004
  • None found