Testolactone

Testolactone (INN, USAN) (brand name Teslac) is a non-selective, irreversible, steroidal aromatase inhibitor which is used as an antineoplastic drug to treat advanced-stage breast cancer.[1][2][3][4] The drug was discontinued in 2008 and is no longer available for medical use.[4] However, it has been reported to still be marketed in the United States by Bristol-Myers Squibb under the brand name Teslac.[5&a... [wikipedia]