Did You Ever See A Completely Bald Man Grow His Hair On Finasteride?
I say a man who at the age of 73, went on Proscar for a Prostate blockage (Benign Prostatic Hypertrophy) who grew hair on the front and top of his head within a year or starting the drug. I knew personally, and he was proud to show me what he grew on his own without a hair transplant. Another doctor reported a patient named ‘Joe’ who was around 58 when he first met him 1990. His entire U-shaped scalp (Class 7 pattern of balding) had been totally shiny bald for the previous 20 years and was such when that doctor examined him. Eight years later, he got a letter fromn the patient saying that his urologist had put him on finasteride 5mg a day for his prostate and he was amazed at all of his hair grew all over the crown. The doctor received pictures which validated these claims.
So to answer this question, I would rather ask Urologist just how often they see this phenomenon. It is clearly not totally rare.