i was on a cycle last year and went to my Dr. for some propecia, i told him i was on juice and he was cool with it. He's into bodybuilding, anyway, i told him i was on and my hair was falling out and i needed some propecia, he said "do you want to be big, or want hair?" you can't have both. Propecia won't help while on, he said if i want to keep my hair, come off, if i want to be big, stay on....