Stage 2 Trials of Pirenzepine for Neuropathy

After hours of research: oral pirenzipine WAS available in Europe and Japan BEFORE WinSanTor bought the patent. Saw it worked on vagus nerve. Found posts oral med helped with painful neuropathy after continued use!
I'm told WinSanTor took it OFF the market.
WHY would they do that?
Research finds:
Patent law states "another guide is whether a patent Monopoly is exploited in a manner that leads to substantial perverse social consequences to the extent that this practices disproportionately generate socially undesirable consequences".
I think this is saying that a patent should not cause negative consequences for society...
I don't know much about patent law in U.S. versus worldwide. I don't know if and when their patent expires.
What I do believe is that a company has no legitimate right to take away availability of meds that have been tested and approved (in this case for ulcer treatment on vagus nerve)
My hope is that enough of us join together to file a complaint to get this unusual health problem resolved.
LindaHarding