Hi, Thanks for asking. I understand your concern. Duphaston is a hormone progesterone .. taking important part in menstruation &fertility. This time it was given for inducing periods Glyciphage is a medicine toincrease use of glucose in blood... reduce fat &weight.(one of the cause of irregular periods) Both the drugs do not interfere with each other s action... can be taken together. Following the withdrawal bleeding.. you would be subjected to ovulation study,thyroid &ovarian study... to find cause of the delay in period &then specific treatment would be possible.. Ifcurrent doctor is a gynecologist.. you can continue the treatment... if not consult a gynecologist Thanks.