Design and Synthesis of Novel Androgen Receptor Antagonists with Sterically Bulky Icosahedral Carboranes

GT20029 and pyrilutamide are both androgen antagonists but work differently; GT20029 degrades the androgen receptor, while pyrilutamide blocks DHT from binding. GT20029 is expected to have similar efficacy to CosmeRNA.

Pyrilutamide is a selective AR antagonist with a high binding affinity, making it effective in competing with DHT for androgen receptors. The 1% concentration is more effective than the 0.5%, but the latter may suffice for mild hair loss; the drug is considered a good option for those avoiding 5AR blockers due to side effects.

Bicalutamide blocks androgen receptors, preventing testosterone and DHT from binding, which can help with hair loss but may cause feminization. It is not recommended for those who do not want feminization effects.

A 30-year-old woman with androgenetic alopecia is considering bicalutamide to slow hair loss but is concerned about its impact on muscle growth due to its anti-androgen effects. Alternatives suggested include dutasteride, spironolactone, RU58841, and minoxidil, with concerns about bicalutamide's side effects.

The conversation discusses androgen receptor degraders for hair loss, highlighting their potential advantages over traditional AR blockers like RU58841 and pyrilutamide. Concerns about the safety and cost of these treatments are also mentioned.

Pyrilutamide is officially available for purchase, and users suggest Fluridil as an alternative topical anti-androgen. Some users report positive results with pyrilutamide from Koshine.