I was on Propecia for over two years when I noticed I had weaker erections, lower semen output and lower sex drive. I quit taking Propecia about 5 months ago and unlike the manufacturer’s promises, the symptoms did not immediately go away. I saw a urologist and had my testosterone level tested. It was 600 and he said this was perfectly fine so this may not apply to those who have developed lowered testosterone.
I increased my workouts to 5 to 6 days/week, which included intense weightlifting, running 2-3 miles/day and in addition I take 3 g of maca and 3 g of L-Arginine per day. After 4 months, I began to see major improvement (i.e. I feel like having sex all the time, much harder erections) and it has stayed that way. I feel very good right now and I’m extremely relieved to see positive results after hearing all the horror stories here.