Undecatrex is part of the Androgens class and treats Testosterone Replacement. Androgens are used as a testosterone replacement and to treat breast cancer and endometriosis. They work by increasing testosterone levels in the body. Undecatrex is only available as a generic drug. Get Undecatrex for as low as $428.65, save up to 80% off the average retail price for the most common version, by using a GoodRx coupon.