Phenytoin can make the Cyproterone Acetate + Ethinyl Estradiol tablet work less well. It makes the liver break down the estrogen in the tablet faster than normal, so less of it stays in the body. If you take both together, the tablet may not give you its full benefit.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.