Hello, Femodene tablet contains two active ingredients, ethinylestradiol 30micrograms and gestodene 75 micrograms. Theses are naturally occurring female sex hormones, oestrogen and progesterone. Combined pills like Femodene over-ride your natural menstrual cycle and work mainly by stopping your ovaries from releasing an egg each month (ovulation). They also increase the thickness of the natural mucus at the neck of the womb, as well as thinning the womb lining (endometriem), making it more difficult for any successfully fertilised eggs to implant there. The early side effects can be nausea, breast tenderness, and headaches are usually minor and infrequent complaints. Usually, these symptoms resolve within the first months of use. Unscheduled bleeding also known as breakthrough bleeding, unscheduled bleeding is the most common early side effect after this medicine initiation. We counsel patients that unscheduled bleeding can also occur as a consequence of prolonged. Amneorrhea occurs intentionally with continuous and extended this contraceptive medicine. So the most common side effects include slight bleeding or spotting between periods in the first few months, also can be lighter periods or sometimes stopping of periods.. You should not take this medicine if your are over 35 years old, smoking, obesity, high blood pressure, uncontrolled DM.... If you miss the medicine please discuss with your doctor to rule out pregnancy. Hope I have answered your query. Let me know if I can assist you further. Best regards, Dr Heang Chan Raksmey, General and Family Physician