It won't be any cheaper on the world market. The only reason American-made drugs are cheaper on the world market is because Americans pay full price at home. The "cheap drugs" from abroad are disgusting examples of socialist price-fixing that hurts American capitalism and science. Canadians and thieving Americans can go to Hell.
Then why are drugs, including American drugs, also cheaper in countries like Switzerland (where my wife is from, so we visit every year), where there are no price controls or government buying programs?
No, the one and only reason why drugs are more expensive in the US is that the FDA, at the behest of drug companies who want capitalism for their customers while reserving socialism for themselves, forbids Americans from shopping around. We can freely import computer chips from anywhere we want to - why isn't that hurting Intel and AMD?