Last updated on: 9/10/2007 | Author:

Andrew Johns, MB Biography

Senior Lecturer and Consultant Psychiatrist in Forensic Psychiatry at the Maudsley Hospital in London
Not Clearly Pro or Con to the question "Should Marijuana Be a Medical Option?"

“Given that high doses of cannabis can cause a toxic psychosis, then it may be supposed it will aggravate the symptoms of schizophrenia. However, clinical experience suggests that some patients say that they take cannabis as a form of ‘self-medication’.”

“Psychiatric Effects of Cannabis,” British Journal of Psychiatry, 2001

Theoretical Expertise Ranking:
     Key Experts
Physicians [Physicians are the "key experts" in the medical marijuana debate because the issue is thought by many to be ultimately based on the medical value and risks of marijuana, and Physicians, with their training and clinical work, should (at least in theory) have the best knowledge of marijuana's medical value and risks.] [Note: Key Experts definition varies by sites that have this designation.]
Involvement and Affiliations:
  • Senior Lecturer and Consultant Psychiatrist, Forensic Psychiatry, Maudsley Hospital, 1999-present
  • Lead Clinician, Southwark Forensic Services, 1999-present
  • Programme Director, South London (East) Forensic Specialist Registrar Training
  • Honorary Senior Lecturer, Department of Forensic Psychiatry, Institute of Psychiatry.
  • Senior Lecturer, Department of Forensic Psychiatry, Institute of Psychiatry in London
  • Honorary Consultant Forensic Psychiatrist, Broadmoor Hospital, Bethlem Royal Hospital, and Maudsley Hospital
  • Senior Lecturer, Psychiatry of Addiction, St. George’s Hospital Medical School, 1988-1995
  • Clinical Director of Addiction Services, St. George’s Hospital Medical School, 1988-1995
  • Psychiatric trainee, Maudsley Hospital, 1981
  • MB, Guy’s Hospital, 1978
  • BS, Guy’s Hospital
  • BSc, school unknown
  • Fellow of the Royal College of Psychiatrists (FRCPsych)
  • None found
Quoted in:
  1. Does Marijuana Use Increase the Risk of Psychosis (Including Schizophrenia)?