From what I've been able to find on the net, Procurin seems to not be a drug but the product of a procedure. (Please correct me if I'm wrong.) They draw your blood and then concentrate certain elements in it. The procedure's probably patented, but you can't patent and sell people's own blood products. One web page said the price was $80 a dose.

The disease, as folks above have stated, has symptoms which can come on fast and be devastating, then just go away. If all that exists is anecdotal evidence, there's no way to tell if the Procurin had any effect or whether the symptoms just let up.