Any Canadian who has the proper documentation from their physician can legally possess and consume cannabis in any form (dried flowers, oils, creams, extracts, tinctures, etc).
Medical marijuana has been legal in Canada since July 2001, when Health Canada implemented the Medical Marihuana Access Regulations (MMAR). Under the MMAR, patients could grow their own medical marijuana, have a caregiver grow it on their behalf, or purchase it directly from Health Canada.
On March 31, 2014, the MMAR was repealed, and a new program was put in place. Under the new Marijuana for Medical Purposes Regulations (MMPR), patients were could no longer grow medical cannabis for themselves and were required to purchase it from Health Canada-licensed producers.
In August of 2016, the MMPR was succeeded by the Access to Cannabis for Medical Purposes Regulations (ACMPR). Under this new program, patients can continue to purchase cannabis from a federally-licensed producer OR they can once again grow their own (or have a person designated to grow on their behalf).