Propecia, aka Finasteride, is a DHT blocker for hair loss prevention on high doses of Testosterone and enhanced prostate health. 

• Usage: 1 mg ED for hair loss prevention, up to 5 mg for prostate health.
• Cycle Duration: Long-term use alongside Testosterone.
• Safety: Generally safe, one of the possible side effects is reduced libido.
• Effects: Slows down DHT-derived hair loss, supports prostate function.
• Stack With: Minoxidil and Biotin for hair and scalp health.