Many of these drugs are cheap because the patent has expired. Many times, it's not until the patent has expired that they learn the new use for the drug, but by

Many of these drugs are cheap because the patent has expired. Many times, it's not until the patent has expired that they learn the new use for the drug, but by that point, they can't make money off of it. It shames me to think that we have a for-profit healthcare system.