Actually, it works the other way around. If the FDA approves the drug for US distribution and sales, many foreign markets take the that’s-good-enough-for-us attitude and permit sales in their markets without whatever screening process is in place in that country. In Canada, because of their healthcare system, drug companies are forced to negotiate with the gov’t which sets the price. The drug companies can either accept that price or kiss off selling in that market. If the marginal cost per pill is low, what would you do: Slam the door on the market, or take what you can and use it to fund R&D on other drugs?
That is not really true.