Ahmed N. Hassan, MD

Institute of Medical Science, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Addiction Division, Centre for Addiction and Mental Health, Toronto, Ontario, Canada; Department of Psychiatry, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Department of Pharmacology and Toxicology, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; King Abdulaziz University, Jeddah, Saudi Arabia

  • 4Articles
  • 32.6KReads
  • 2017–2026Active
  • 5Collaborators
  • 37Citations

About

Ahmed N. Hassan, MD, is affiliated with the Institute of Medical Science and multiple departments at the Temerty Faculty of Medicine, University of Toronto, as well as the Centre for Addiction and Mental Health in Toronto and King Abdulaziz University in Jeddah. His publications focus on addiction and posttraumatic stress disorder, examining topics such as cannabis abstinence effects in comorbid PTSD and cannabis use disorder, clinical effects of cannabis and cannabinoids on PTSD symptoms, and the intersection of substance use disorders with major depressive episodes and co-occurring depression and anxiety in alcohol use disorder. He has collaborated frequently with authors including Justyne D. Rodas and Tony P. George.

Publications

JCP
Effects of Extended Cannabis Abstinence in Comorbid PTSD and Cannabis Use Disorder
Original Research

Effects of Extended Cannabis Abstinence in Comorbid PTSD and Cannabis Use Disorder

February 18, 2026

Participants who achieved abstinence reported significantly greater reductions in total PTSD symptom severity and symptom count compared to those who did not.
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JCP
Systematic Review of the Effects of Cannabis and Cannabinoids in PTSD Symptoms and Symptom Clusters
Systematic Review

Systematic Review of the Effects of Cannabis and Cannabinoids in PTSD Symptoms and Symptom Clusters

February 14, 2024

This review of 14 studies did not find major benefits of cannabinoids in improving overall PTSD symptoms, although some benefits in cluster B and E symptoms were seen. Risks...
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JCP
Original Research

Substance Use Disorders and Major Depressive Episodes

July 27, 2021

An estimated 10% of the burden of depression is attributed to substance use disorders (SUDs). This study aimed to clarify the relationship of major depressive episodes (MDEs) to SUDs...
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JCP
ASCP Corner

Alcohol Use Disorder Co-Occurring With Depressive and Anxiety Symptoms

December 12, 2017

A third of the US population has alcohol use disorder at some point in their lifetime, and these individuals often also have symptoms of depression or anxiety. This ASCP...

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