My recollection is that Canada called a meeting with all the pharmaceutical manufactures and told them that if they didn't sell their product in Canada at what the Canadian government thought was a reasonable price, Canada was going to revoke all of their patents and allow Canadian companies to manufacture their products.
Basically extortion, but with sufficient real threat behind it that the companies really had no choice. They either complied, or they would be destroyed by Canadian companies making their products without having to pay for their research and development costs.
That is my recollection as well. And that is totally unacceptable.