I have been taking one pill of dutasteride and Propecia daily for about 7 moths now. After using Propeica for about 6-7 years successfully, it's effectiveness started to wear off. I read a couple of posts of people who had the same issue and started using dutasteride with success (some staying on finasteride and some going off). dutasteride has been good to me (maintained hair), however, I also started using minoxidil around the same time. As for the side effects my libido is still strong, the only issue I had was really dry skin for about 2 weeks after starting dutasteride.