Big pun, you can get the 1% Nirazol shampoo....2% you need a presciption...Studies have shown that there's no difference 1% or 2%...I have a couple of friends that use and are very happy with the results..Like I said before, try to find a MD that will prescribe Proscar because it's covered under your insurance! But if you want your wig to stay on then spending a couple of bucks won't kill you!