I flew to Kelowna on Air Canada from Calgary, they picked it up on the X-ray scan of my carry on baggage. I told them I had documents proving it's medicinal but they couldn't look at my documents because of a privacy rules. They called in a Calgary Police officer he checked my documents and said it's legal and that I was allowed to bring it on my trip. The whole thing took about five minutes.
On another note the guy behind me had his sons sippy cup half full of water and they were way harder on him. Lol.