my advice, if you aren't sure if you are losing your hair, is to go an see a dermatologist. If they tell you that you do have male pattern baldness, then go on propecia if that's what you feel is the treatment that would fit you best. Most likely, taking propecia would not really harm you other to give you the slight possibility of the negative side effects. propecia does not cause you to lose hair, it only helps. but, it only helps if you are suffering from male pattern baldness, otherwise you would just be wasting money.