There are sides but in my case they always go away. If you want to make an attempt at keeping your hair for as long as you can then I'd recommend you base you decision on whatever you choose on that. Don't go on finasteride if you are afraid or doubtful that you could be effected immensely by the sides that a lot of people do experience. This is a journey for all of us and we make it our own. No one had told me exactly what to do. I did my research became well informed and made my decisions.