Last updated on: 11/3/2011 | Author: ProCon.org

Don H. Linszen, MD, PhD Biography

Title:
Professor Emeritus of Psychiatry in the Academic Medical Centre of the University of Amsterdam
Position:
Not Clearly Pro or Con to the question "Should Marijuana Be a Medical Option?"
Reasoning:

“Numerous studies have found a robust association between cannabis use and the onset of psychosis. Nevertheless, the relationship between cannabis use and the onset of early (or, in retrospect, prodromal) symptoms of psychosis remains unclear. The study focused on investigating the relationship between cannabis use and early and high-risk symptoms in subjects at clinical high risk for psychosis.

Results: Younger age at onset of cannabis use or a cannabis use disorder was significantly related to younger age at onset of six symptoms. Onset of cannabis use preceded symptoms in most participants.

Conclusion: Our results provide support that cannabis use plays an important role in the development of psychosis in vulnerable individuals. Cannabis use in early adolescence should be discouraged.”

“Cannabis Use and Age at Onset of Symptoms in Subjects at Clinical High Risk for Psychosis,” Acta Psychiatrica Scandinavica, July 12, 2011

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:
  • Research Advisor, Maastrict University, Apr. 2011-present
  • Supervisor, residents in psychotherapy, Academic Medical Centre, University of Amsterdam, June 2009-present
  • Professor of Psychiatry, Academic Medical Centre, University of Amsterdam, Jan. 2000-present
  • Psychiatrist, private practice, 1981-present
  • Head, Department of Psychoses and Schizophrenia, Academic Medical Centre, University of Amsterdam, 1995-2010
  • Director, Adolescent Clinic, Department of Psychiatry, Academic Medical Centre, University of Amsterdam, 1989-2000
  • Senior Lecturer, Academic Medical Centre, University of Amsterdam, 1989-2000
  • Chief, Adolescent Clinic, Department of Psychiatry, Academic Medical Centre, University of Amsterdam, 1983-1989
  • Lecturer, Academic Medical Centre, University of Amsterdam, 1983-1989
  • Member, ZonMw (Netherlands Organisation for Health Research and Development)
  • Member, Board of Directors, Ria van der Heijden Foundation
Education:
  • PhD, Schizophrenia, Academic Medical Centre, University of Amsterdam, 1993
  • MD, Health, Academic Medical Centre, University of Amsterdam, 1976
Other:
  • Dr. Linszen is the Chair of the Scientific Advisory Board of RoaMeR (Roadmap for Mental Health Research)
  • Recipient of the Royal Award for “Officer of the Order of Orange Nassau”
  • Recipient of the Ria van der Heijden Award (special merits for family members of patients with schizophrenia)
  • Chair of the Ria van der Heijden Award committee
  • Chair of the Scientific and Local Organizing committee of the 7th International Early Psychosis Association Conference