Why Do Some Men Have Increased Libido from Propecia?

Dear sir,

When I started on finasteride I noticed a very strange but rather pleasant side-effect: an increased libido. This makes sense since finasteride raises the levels of total testosterone; it is, however, contrary to the science literature, which commonly reports DECREASED libido as a potential side-effect.

Why do some men suffer a decreased libido when finasteride actually gives them more testosterone? Thank you and best regards

We really do not know the reasons for the increase or decrease in libido that some rarely observe after taking finasteride. The decrease is seen in 1-2% of men, and the increase is even more rare… so congratulations!