I have been using spiro for a while. I tried propecia for a month was miserable. I have had nothing but a great experience with spiro. ZERO side effects, except of course for significantly slowing down MPB. If you are getting yours from Dr. Lee, Id reccommend 2% because it is much easier to apply, unless you have a buzz cut 5% is very difficult to apply, especially if you have diffuse thinning. If you have any other questions, you can PM me.