Cannabinoid Hyperemesis Syndrome : A Case Report and Discussion Regarding Patients with Concurrent Disorders Stephen Lee-Cheong, Amrita Grewal, Lukas Hestvik, Reza Rafizadeh, and Christian Schütz The Canadian Journal of Hospital Pharmacy, 2020, 73, (4), 290-293   INTRODUCTION In October 2018, Canada legalized the nonmedical use of cannabis. Usage has traditionally been high in Canada, and after legalization, self-reported use increased from 14% to 18%.1 Given this increased usage, it is important to understand the adverse effects of cannabis. Here, we focus on a less well-recognized consequence, cannabinoid hyperemesis syndrome (CHS), first described in 2004.2 It may be seen more often in jurisdictions where cannabis is legalized; [...]