The Liberal government quietly exempted them this week from a law that bans the use of e-cigarettes anywhere regular cigarettes are prohibited.
It means medical marijuana users can vaporize in restaurants, at work or on playgrounds.
Associate Health Minister Dipika Damerla says under the exemption for medical marijuana users, employers or restaurant owners could still ban them from smoking on the premises.
She says it's about letting people who are very sick or in a lot of pain to take their prescribed medication when they need to.
Jonathan Zaid, the founder of Canadians for Fair Access to Medical Marijuana, says the regulations don't change much since medical marijuana users could already smoke "pretty much" anywhere before the e-cigarette law was passed in May.
He highly doubts the change in regulations will mean medical marijuana users flooding playgrounds and restaurants to vaporize.
"Everyone that I know, including myself, who uses medical cannabis is discreet about it," Zaid said.
"They just want to use it as their medicine to feel better, to live a better quality of life and they don't want to be harassed about it, so that also means they're not typically likely to do it in a very public space."
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