Hello dear Understand your concern. Use of suvidha birth control pills: - As birth control - For irregular menstruation - For emergency contarception - For Dysfunctional uterine bleeding - For pre and post pone the period Side effects of suvidha birth control pills. Intermenstrual spotting Nausea Breast tenderness Irregular periods, nausea, headaches or weight change. Headache Malaise, weakness Weight gain Mood change Decreased libido Vaginal discharge Visual changes How to use: It contain 7 brown tablet: iron tablet, it should be taken during the menstruation period (during period) And 21 white tablet of estrogen and progesterone: that should be taken for 21 days, start from the last day of period (When there is no bleeding) Continue for 21 days, at last days bleeding will come and during bleeding days again take brown tablet of iron. But I think you should try other method, because if you will take for 2 years, Chance of adverse effects is very high. Use condoms or you can put IUD Hope this may help you. Best regards DR,sagar