Does Finasteride Reduce Penis Size?

Does finasteride make your penis smaller by reducing blood flow to it? Have there been any studies on that?

I know that many men have complained of this, but you must recognize that a man’s penis size changes throughout the day. It is often larger at night, and smaller during the day when not in use. I don’t have any evidence one way or the other on any connection between penis size and finasteride, but if your sexuality is impacted by this drug, I would think that it would be smaller from less use.