Long time since I have posted, but I thought this was interesting enough to share.
I have been a proponent of Ketoconazole (e.g. Nizoral) usage for regrowth. While most have assumed this was fungus related, I have long believed this was linked to the prevention of local synthesis of androgens; i.e. Intracrynology.
Now a UK biotech has introduced a new drug (Abiraterone) that tackles advanced prostate cancer effectively using the same mechanism; it appears that cancer tumors have the ability to synthesize the androgens they need to feed. Abiraterone works by preventing this local synthesis.
Abiraterone is entering Phase 3 and may be worth watching as a potential topic for use in hair growth (or prevention of further hair loss).