I'm in a very similar situation to many of you posting. I'm 25 y/o and my once perfect hairline now looks like the Italian peninsula. I have been on propecia for 13-14 months without any slowing of my hair loss.
I consulted two HT surgeons for an evaluation. Although the first guy was willing to perform the surgery I decided to get another consult (actually never met him, only met his educator). I recently saw a more reputable doc, one who is discussed frequently on this site. He advised that I was not ready for the procedure because of my age and unpredicatbility of future loss. I respect him tremendously for his honest advice. However, he did recommend that I increase the dosage of propecia I was taking because 1mg was the recommended dose for the average 150lb man. Since I weigh nearly 200lbs he told me to take 2mg/day, and gave me a prescription for proscar since its cheaper (I asked for it). He advised me to take 1 pill every other day, which is a dose of 2.5mg finasteride/day.
What have other peoples' experiences been with increasing doseages? As I am hoping for improved results, I am also aware of the greater likelihood of side effects. Anyone's experience would be valuable to hear about.