Hi Hashini, Welcome to Healthcare Magic Forum. I have gone through your Query & I really appreciate your concern about the problem you are facing. As a physician I would like to tell you that the drug is synthetic progesterone which is responsible for healthy growth of Uterine lining in females which is necessary to preserve and mature the pregnancy firther. These tablets are to taken for 10mg once daily up to 12th week of pregnancy if you have habitual or recurrent abortion issues. So I would like to suggest that you should talk to your physician about these side effects and perhaps change the dosage or brand of the drug. For your further information, I m giving common side effects f these tablets below : Pulsating headache which can develop into a migraine Pain in breast and breast tenderness Occasional blood spotting Pain during periods Irregular period Heavy bleeding during periods Missed period Weight gain Depression Abnormal liver function which can progress into jaundice Nausea and abdominal discomfort Hypersensitivity Thanks for Trusting & Posting your Query on this forum. Hope this will help you. Feel free to ask any further question. Have a nice Day. Regards, Dr.Abhijeet