Not sure about Canada, but over here it's otc. And very effective. As I say, mum uses it and she has uber dry eyes from the macula degeneration.
[eta] according to the website, it's over the counter for Canada too. You can buy online:
http://www.canadadrugs.com/group/Vis...00.2%25/22237/
The smallest tube is 10grams, at $8.15. But taking postage into account you might want to get a bigger order. Dont know how much the postage is mind.
It is way more effective than anything else on the market as far as mum can tell, and she's tried a hell of a lot of different stuffs, most of which were total pants.