Google, Dude, google.com.
Proscar is not a steroid! Proscar is for Benign Prostatic Hyperplacia. (a swollen prostate that's non cancerous).
It has also shown to grow hair or lessen hair loss. Which is what this gentlemen is most likely looking for.
The active ingredient is Finasteride. Propecia has 1% fin. Proscar has 5%. It's all over the net, bro.