Immunologist and cell biologist Ralph Steinman died from cancer in September last year, just before he was supposed to pick up his Nobel Prize in medicine. If there had been a bullet proof cure for cancer, I'm pretty sure he would have known about it.
Anyway, if the drug is already used to treat metabolic disorders it means it is commercially produced, so it should be pretty easy to find a doctor who is willing to prescribe it for cancer patients it it has been showing promising results.
"I don't think you can underestimate the amount of motivation that Quinton Jackson will have coming back here and fighting in Japan." - Joe Rogan