Hi, Dronis tablet contains both ethinyl estradiol and drospirenone which is used for contraception or preventing pregnancy and in the treatment of irregular periods. It helps to prevent an egg from being released from ovaries. It makes the fluid or mucus in your cervix thicker, which makes it more difficult for sperm to enter the womb. Additionally, it prevents thickening of the lining of womb, thereby making it unfavourable for an egg to grow in it. Side effects in taking Dronis for long term are nausea, stomach pain, headache, vomiting, weight gain, irregular uterine bleeding, diarrhea, abdominal pain, GIT upset, breast tenderness, depression, dizziness, flu like symptoms, vaginal bleeding, breathing difficulties, anxiety, sleep disorders, loss of consciousness, allergic reactions etc. Dronis 20 tablet is a reliable and safe method for contraception, if used correctly. It doesn t interrupt with sex and you can lead a normal routine life without any worries. Take it as directed by the doctor to get the most benefit. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General & Family Physician