mood
I believe it may be a small minority, but anytime you take a drug there are possible side-effects. I was only on Finasteride for about five weeks, but I noticed a sharp decrease in my will and motivation. I wouldn't say I was depressed, but I was NOT myself. I was very careful to look at other possibilities in my life and there weren't any.
This does NOT mean I am saying that everyone, or even a large minority will suffer from this. However, to me, given that I have a very high sex drive, and am very aggressive compared to other males that I have known, it does seem POSSIBLE that anything that alters a significant chemical in my body which MAY BE THE FOUNDATION OF THOSE CHARACTERISTICS, may also have an effect on those attributes in a negative manner.
Propecia is clinically tested, and safe. I do not dispute that. That does not mean it will not have undesired consequences on any particular person, any less than the pill does for women.
I am in total agreement with HairLossTalk.com's philosophy on logic when it comes to these studies (as well as overwhelming evidence, scientifically based). I do know that five times the dose has been studied and used for years in this case...however, OTHER aspects of this drug, just as with the pill for women, have not really been looked at. In this sense, I believe long-term effects, and studies regarding them, are in their infancy.