Dizziness, light-headedness, headache, stomach upset, bloating, nausea, weight changes, increased/decreased interest in sex, breast tenderness, or skin redness/irritation at the application site may occur. If any of these persist or worsen, notify your doctor or pharmacist promptly. Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor immediately if any of these unlikely but serious side effects occur: mental/mood changes (e.g., severe depression, memory loss), vision changes (change in contact lens fit, loss of vision), swelling of hands or feet, stomach/abdominal/pelvic pain, vomiting, breast lumps, unusual vaginal bleeding (e.g., spotting, breakthrough bleeding, prolonged/recurrent bleeding), unusual vaginal discharge/itching/odor, yellowing eyes or skin. Seek immediate medical attention if any of these unlikely but serious side effects occur: calf pain/swelling, sudden severe headache, chest pain, trouble breathing, weakness on one side of the body, slurred speech. A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist. In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.