Once a company in the US has figured out a treatment for eclampsia, Europe can steal this knowledge for free (i.e. price-control them according to cost) while the US company must price-gouge against the manufacturing cost to recoup the R&D costs. This factors heavily into how much healthcare costs in the US (not to be interpreted as 'it's the only reason'); it's the same dynamic as 'world police'. If under-patent drug prices went up in Europe they would go down in America.