Clascoterone: A Topical Anti-Androgen for Hair Loss (2025 Update) Last updated December 2025. This page will be revised as new data and regulatory decisions are released. Clascoterone (also known as CB-03-01, and under development as Breezula for hair loss) is a topical anti-androgen that blocks the effect of dihydrotestosterone (DHT) directly at the hair follicle….read more