Because technically, it's against FDA regulations to consume or is it sell (?) generic cialis within the U.S. Something about a patent agreement or some shit. Either way, I have always (the last FIVE orders I've made) just added ''Will not be used in the U.S.'' inside the comments box, and I always get what I order. It's legal mumbo jumbo bull to cover their ass, nothing more. Works for their generic cialis too.