What is the risk of sexual side effect and/or PFS with the drug dutasteride?

Dutasteride has never gone through the FDA trials in young men who wish to use it for hair loss, so without clinical studies it is all anecdotal. As dutasteride is both a type 1 and type 2 blocker and a more effective DHT blocker on the competitive inhibition side, I would suspect that the sexual side effects as well as the risk of PFS would be equal to or more than finasteride. Just a guess.