Regarding your comment on loose opioid prescription, in Québec (I cannot talk about other province because health care is a provincial juridiction) , they are not a thing anymore.

20 years ago it was like you said: I received 40 pills of oxycodone 20mg for a strained muscle. But nowadays they're quite strict, too strict imo: a few month ago my wife broke a vertebrae and she only received only 20 pills of hydromorphone 1mg and a month of antacid coated naproxen.