The generic name of Dayen 35 is ethinyl estradiol cyproterone tablets. Common side effects are disorders of the gastrointestinal system, weight gain, neurological as well as reproductive disorders. There are more contraindications for this drug, such as it is prohibited for patients with venous or arterial thrombotic or thromboembolic diseases, and it cannot be combined with other hormonal contraceptives. Patients are advised to use the drug with caution under medical supervision. Ethinyl estradiol cyproterone tablets are mainly used for oral contraception, but also for the treatment of moderate-to-severe acne and/or hirsutism due to androgen sensitivity in women of childbearing age, including patients with polycystic ovary syndrome who require treatment for these symptoms. Side effects include symptoms such as nausea and vomiting, diarrhea and abdominal pain, weight gain, depression, breast pain, tenderness, decreased libido, rash, hives, allergic reactions, and changes in vaginal or breast secretion. Contraindications include: venous or arterial thrombotic or thromboembolic disease, prodromal symptoms of thrombosis, severe sickle cell anemia or hypertension, focal neurological symptoms of migraine involving blood vessels, hypertriglyceridemia-related pancreatitis, severe hepatic insufficiency or hepatic neoplasms, sex steroid hormone-related malignancies, undiagnosed vaginal bleeding. In addition, it is prohibited for those who are allergic to the ingredients of ethinyl estradiol cyproterone tablets, smokers are prohibited, pregnant or lactating women are prohibited, it can not be used for men, and it is prohibited to combine it with other hormonal contraceptives. If you need to use ethinyl estradiol cyproterone tablets, it is recommended to consult a professional doctor, follow the doctor’s instructions for standardized treatment, not blindly self-medication.