Hi Sheeba, Thanks for posting your query. I am happy to address your questions. The active pharmaceutical ingredient present in Deviry Tablets is Medroxyprogesterone. The most common side effects are acne; changes in menstrual flow, including breakthrough bleeding, spotting, or missed periods; dizziness; drowsiness; fever; headache; hot flashes; nausea; nervousness; pain; rash; sleeplessness; stomach pain; weakness; weight gain or loss. If any of the below serious events occur like severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); chest pain; depression; lumps in the breast or under the armpits; partial or complete loss of vision or changes in vision; shortness of breath; slurred speech; sudden loss of coordination; sudden or severe headache; swelling of fingers or ankles; tenderness, pain, or swelling of the calf; weakness, numbness, then will recommend you to see your clinician. Hope I have answered your query. If you have any further questions, I will be happy to help. Thanks