Dear Maria, Hi I appreciate your concern for the safety of the prescribed pills. Microgynon ED is an hormonal combination of estrogen and levonorgestrel. The common side effects of Microgynon ED include: Nausea, vomiting, headache, breast soreness, weight gain, menstrual irregularities, diminished libido, and depression. Other side effects include increased tendency to have high BP, clot formation in the veins, abnormal liver functions, etc . The common side effects of ferrous fumarate include: Nausea, vomiting, heartburn, constipation, passing black or dark-colored stools, staining of the teeth, etc. Hope to have answered your query.