Yup.  The profits have to come from somewhere or why would they make the drugs in the first place.  The other countries simply follow the U.S.  Thats why these companies lobby to get on the approved list (though those costs are relatively low).  Once they do, they get approved in Europe, Asia, Canada, etc.  

The U.S. should pass a law forbidding the discounting of drug prices across the G-7 countries.  No reason we should subsidize them.