Actually, there is no reason in the Constitution, nor any ideological reason in free market economics, why the prices of pharmaceuticals and medical devices under patent cannot or should not be regulated in the public interest. Despite the sloppy habit of accepting rent-seekers denomination of patents (and copyrights) as a species of property, they are, in fact, government grants of monopolies. A product under patent is not actually sold on the free market unless there are competing products that can be substituted for it -- this is not the case for the sole effective treatment for some disease, or a treatment so much superior to other available treatments that they are not substitutes. Such a product is sold in a monopoly market, just like the services provided by utilities. We recognize that the prices of "natural monopolies" like utilities should be regulated in the public interest, but have bought into the strange notion that the prices of monopolies artificially created by patents should not.