Get immediate medical attention if you see any signs of allergic reaction in the form of swelling of your lips or face, difficulty in breathing, and hives. Stop the use of this medicine immediately if you any of the following severe side effects: Vaginal bleeding or discharge, Unusual bleeding, easy bruising, or discoloration of the skin, Feeling restless or tired, Stomach pain, nausea, vomiting, Confusion, Increased thirst or urination problem, Joint pain, Loss of appetite, Chest pain, rapid breathing, wheezing, coughing up blood, Eye pain, seeing halos around the lights, or blurred vision, Pain, swelling, redness, or warmth in the legs, Sudden numbness on one side of your body, Tremor or loss of movement, Jaundice Some less serious side effects are: Constipation, mild nausea, Depression, Hot flashes, sweating, Itching or skin discoloration, Swelling of hands or feet, Spinning sensation, dizziness, Hair loss