http://en.wikipedia.org/wiki/Naftopidil http://en.wikipedia.org/wiki/Naftopidil ;
Naftopidil, a selective alpha-1 adrenoceptor antagonist, inhibits growth of human prostate cancer cells by G1 cell cycle arrest. Kanda H et al. Int J Cancer. 2008 Jan 15;122(2):444-51.
The pharmacological and toxicological properties of this product have not been fully investigated. Exercise caution in use and handling. This product must not be used in humans.