Psychotic Disorder and Cannabis Use


This report examines hospitalisation trends related to cannabis use and mental and behavioural disorders in Canada between 2006 and 2015.

During this period, the rate of hospitalizations related to cannabis use and mental and behavioural disorders more than doubled and the rate of hospitalizations specific to cannabis-related psychotic disorder tripled.

This research supports monitoring the impacts of cannabis legalization and regulation.

RSMj 2020 4th Annual Scientific Meeting (Virtual)

Event Date

The 4th Annual Scientific Meeting of RSMj will be held virtually! In this abbreviated meeting, RSMj welcome all members and non-members alike to join the virtual meeting at no cost on Friday, July 24, 2020 from 2:00pm - 5:00pm EST (11am - 2:00pm PST).

This meeting will begin with a keynote address by one of RSMj's Board Members, Godfrey Pearlson. Dr. Pearlson is a Professor at Yale University School of Medicine and Founding Director of the Olin Neuropsychiatry Research Center at the Institute of Living.

After this keynote address, there will be a live Virtual Poster Session over Zoom followed by a town hall style meeting where RSMj's Board of Directors ask you about the future of RSMj and cannabis research. 

Jose Luis Vazquez Martinez
To read the full text of the in-depth manual of the UTC for healthcare professionals, please visit:


Video: ISSUP South Africa - Cannabis and the Youth in South Africa

In partnership with ISSUP Global, ISSUP South Africa presented a webinar on Cannabis and Youth in South Africa.

Date: Wednesday, June 3, 2020 

Presenter: Siphokazi Dada


Siphokazi Dada is a Senior Scientist in the Alcohol, Tobacco and Other Drug Research Unit of the South African Medical Research Council.

She has a Master of Public Health Degree (MPH) from the University of London. She is currently registered as a PhD student at the University of Stellenbosch and her area of interest is misuse of over-the-counter and prescription medicines, particularly codeine. She manages the South African Community Epidemiology Network on Drug Use (SACENDU), a drug trends monitoring system operational throughout South Africa’s nine provinces. She coordinates data collection across sites, analyses data and writes reports for this project. Ms Dada is also a Marie Curie Fellow on the CODEMISUSED Project funded by the European Union.

ISSUP South Africa

Impact of Marijuana on Adolescent Health

Learn how using marijuana during adolescence can impact health including affecting the brain, mental health, and increasing risk for addiction and other harms. 

Jose Luis Vazquez Martinez

There is a link between smoking cannabis and developing arteriopathies (Desbois, 2013) and cerebrovascular disease (Wolff, 2013).

Jose Luis Vazquez Martinez

For Utah Prevention Professionals: Marijuana Policy in Utah

Presenter: Scott Gagnon, MPP, PS-C; Director, New England PTTC; AdCare Educational Institute of Maine, Inc.


William Cabanillas Rojas

Marijuana is the illegal drug most consumed in Peru and gender-specific predictors have
not yet been identified in the general population. This information will be relevant for
increasing the knowledge of processes involved in marijuana use. This research has the

Jose Luis Vazquez Martinez

Part 2 from the Grow Your Knowledge: Cannabis Prevention, Policy, and Pharmacology 3-Part Webinar Series


Jose Luis Vazquez Martinez

Grow Your Knowledge: Cannabis Prevention, Policy, and Pharmacology 3-Part Webinar Series


Cannabis Prevention Campaign: Planning and Implementation (Part 1 of 3)


Systemic Review of Systemic Reviews Finds Numerous and Diverse Harms with Marijuana Use

Researchers attempted to assess the global harms associated with marijuana use and potentially define risky marijuana use in a systematic review of systematic reviews. Forty-four systematic reviews including over 1053 diverse studies were analyzed, with an average AMSTAR 2 rating of 60.1%, indicating low to moderate quality. Harm was divided into the following three categories: mental health harm, somatic harm, and physical harm. The authors found that marijuana use, particularly frequent and heavy use, was associated with increased harms in each of the three categories with mental health harms including psychosis, schizophrenia, earlier age at onset of psychosis, bipolar disorder, depression, and anxiety; somatic harms including respiratory effects such as wheezing, shortness of breath, cough, phlegm production, and dyspnea; testicular germ cell tumor development; and various cardiovascular conditions including ischemic strokes, hemorrhagic strokes, ischemic heart disease, and thromboangiitis obliterans; cognitive impairments including memory and learning deficits, reduction in educational attainment, changes in psychomotor, executive function, attention, and concentration; as well as physical harms including increased risk of suicide ideation, suicide attempts, motor vehicle collisions, and victim of homicide.

While these harms are numerous and diverse, a paucity exists in the literature on what defines frequent use, quantity of marijuana consumed, and the type of products used in relation to the harms of marijuana consumption, underscoring both the need for sound scientific research and the priority of the population’s health and safety before legalization.