Testolactone Acetate blocks the production of the hormone estrogen. Certain types of breast cancer require estrogen to grow.Testolactone is used to treat some types of breast cancer.Testolactone may also be used for purposes other than those listed in this medication guide.
Testolactone Acetate is a synthetic anti-neoplastic agent that is structurally distinct from the androgen steroid nucleus in possessing a six-membered lactone ring in place of the usual five-membered carbocyclic D-ring. Despite some similarity to testosterone, Testolactone has no in vivo androgenic effect. No other hormonal effects have been reported in clinical studies in patients receiving Testolactone.
