it is an antiandrogen, i.e. it suppresses the actions of testosterone (and its metabolite dihydrotestosterone
) on tissues.
It acts by blocking androgen receptors which prevents androgens from binding to them and suppresses luteinizing hormone
(which in turn reduces testosterone levels).
Its main indications are prostate cancer
, benign prostatic hyperplasia
, priapism, hypersexuality and other conditions in which androgen action maintains the disease process. Due to its anti-androgen effect, it can also be used to treat hirsutism,
hope this helps