Generous advice your specialist before taking any medicine. Tafenil Generic Name: flutamide (oral) (FLEW ta mide) Brand Names: Eulexin, Tafenil What is flutamide? Flutamide is an antiandrogen. It satisfies desires in the body to keep the exercises of androgens (male hormones). Flutamide is used inside the treatment of prostate development. Flutamide may in like manner be used for diverse purposes.