The common side effects of Darin 35, known generically as ethinyl estradiol cyproterone tablets, include reproductive and neurological symptoms, allergies, and skin disorders, indifferent to the most serious side effects. Ethinyl estradiol cyproterone tablets are an oral short-acting contraceptive that is also used to treat androgen-dependent disorders in women. Common reproductive system side effects in patients taking ethinyl estradiol cyproterone tablets are breast swelling, breast tenderness, enlargement and lactation, and weight gain. In addition, neurologic symptoms such as depression, migraine and insomnia have been observed in some patients after taking the drug. Skin aspects may also occasionally include facial melasma, especially in those with a history of melasma of pregnancy, rash, erythema nodosum, and erythema multiforme. Ethinyl estradiol cyproterone tablets need to follow the doctor’s instructions to take medication, side effects need to stop the drug in time.