Right. You will not be in the business to produce drugs for Canada. Right now the only reason companies are willing to do so (I imagine) is as a sort of loss leader. This situation can exist because Canada's population is small relative to the U.S. In the worst/extreme case, if the price controls became effectively applied to the whole U.S., I imagine drug companies would not sit idly by. They would, by one legal means or another, label their drugs "not for sale in Canada".
Thus destroying Canada's price controls.
So I don't see the problem.
As an American I’m angry I am subsidizing the drug costs of Canadians.
Then let's stop letting them leech off us. Start laundering through their idiotic system, and break it.
You want the price of the drugs to go down, you force the Canadians to purchase the drugs at the price necessary for the firms to recover their investment.
Exactly! Bingo!
Only way to do that is to eliminate their protected system, by taking advantage of it till it breaks.
What breaks is the firms ability to produce the drugs. Perhaps they don’t stretch and try to develop more marginal drugs (those that would have a higher cost of capital), or they slow the rate of development, or the reduce quality, any number of things can happen.
Unfortunately, given the current state of the American people, your proposal to break the Canadian system by using it would only result in the US adopting it. A quick survey of the leading Dem candidates confirms that would be their desired outcome.