But as forrestthewoods pointed out, if the improvements in the new version are so marginal, then you&#x27;d think there would be a booming market for the old version if it was cheaper (generic).  So what&#x27;s stopping the generic manufacturers from cranking out the old versions?  Seems like there would be lots of money to be made, unless patients (the market) actually did value the incremental improvements and would likely chose not to purchase the original formulation.