When i was looking up FIN side effect and then a poll was created, it clearly showed it's NOT 2 percent who have side effects. It's more like 50%.
I personally had side effect and they're gone after I stopped. I just use Rogaine in morning/Lipogaine Shampoo/Azelaic Acid at night and Laser cap every other day. If my hair stays, great. If not, still ok, FIN for me was never worth it.
Also, when you search other forums, there are grown healthy men crying about PFS...that's why I stopped taking it.