Hi, Crisanta LS tablet contains both ethinyl estradiol and drospirenone which is used to prevent pregnancy and irregular periods. It helps to prevent release and fertilization of the egg. Crisanta LS can cause weight gain. Other side effects of Crisanta LS are nausea, vomiting, diarrhea or constipation, dry mouth, headache, sweating, dizziness, changes in sleep patterns, irregular uterine bleeding, difficulty in micturition, delayed wound healing, acnes, changes in sexual drive, facial hair growth, vaginal bleeding, vaginal discharge, changes in appetite, stomach pain, upset GIT, breast tenderness and enlargement, mood swings, depression, fatigue, tiredness, weakness, painful micturition, symptoms of allergic reactions like itching, rashes, swelling of lips, tongue, throat, eyes, face, hands or feet, wheezing, difficulty in breathing etc. If these side effects persist, you should consult your doctor immediately for medical help. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General And Family Physician