I don't know of any concrete examples, but one of the problems with getting concrete examples is that it's very difficult to get information from what Health Canada publishes about drugs that it has withdrawn from the market for safety reasons. In fact, Health Canada does not currently have such a list. If you want to know what drugs or how many Health Canada has withdrawn from the market because of safety problems, say in the past 20 years, you have to go into and search through 20 years of reports from Health Canada to compile such a list. Health Canada doesn't maintain that on its own.
On June 10th, 2014. See this statement in context.