I've been on regrowth.com website for years, and I can tell you from my experience, I think it's more like 50% instead of 2%. every other person that took propecia have side effects.
I've been off propecia, for almost 3 months, and the sexually side effect still stays... everytime during sex, I just pretend I enjoy it so much, and it's killing me.... I feel very depress when i can't even get excited when i was squeezing her breasts... yes, it's really that bad.
please think twice before starting propecia...