@Hehehe, Thanks a lot for mentioning your experiment with finasteride as a treatment for post-Accutane sexual dysfucntion. You have no idea how many people ask me if I know of anyone who tried this. I know of 2 people posting recoveries on the long “repairing damage” thread on acne.org, but they vanished without following-up. There was also a member of this forum who used finasteride to combat hair loss after Accutane and fell into a much worse condition.
Sorry to hear the benefits didn’t last, but this isn’t surprising either, for the reasons discussed in @axolotl’s link.
Did you do this a’ la Kevin Pezzi, where you cycled, or did you take fin daily during this time?