OP: You mention sever PN in feet only. I have a friend who did about everything for her sever 30 yrs of PN in mostly feet, even hyperbaric chambers and all the drugs and their side effects. We saw her go thru some of the S/E from being dizzy to nauseated.

She finally got on Grape Seed Ex about 5 yrs ago and she is almost a new person, lots of years of suffering. She no longer takes the drugs and some tylenol now and then when needed. Here is a thread on the OPC's which include Pycnogenol and Grape Seed Ex.

OPC's have been short of a miracle

I can't speak on the drug you asked about. I work 95% alternatives for my own health.