Hi, Diane contains both cyproterone and ethinyl estradiol which is used to treat symptoms of polycystic ovarian syndrome like excessive hair growth, acne, irregular periods. It also works as a contraceptive. If someone frequently experiences spotting or brown discharge in the middle of the cycle during using this medication, the prescribing physician should be informed immediately. Other side effects are nausea, vomiting, stomach pain, GIT upset, headache, breast pain, mood swings, breast pain, irritability, increased or decreased interest in sexual intercourse, menstrual pain, loss of balance, dizziness, sudden trouble walking, sudden weakness, numbness of face, arm or legs, allergic reactions etc. Take care. Hope I have answered your questions. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician,