Breast tenderness or enlargement; changes in appetite; changes in weight; dizziness; headache; mild hair loss; nausea; nervousness; stomach cramps or bloating; vaginal spotting or breakthrough bleeding.

Seek medical attention right away if any of these SEVERE side effects occur: Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); absent menstrual period; breast discharge; breast lumps; calf or leg pain, swelling, or tenderness; change in amount of urine produced; chest pain or heaviness; confusion; coughing of blood; dark urine; fainting; mental or mood changes (eg, depression); migraines; numbness of an arm or leg; one-sided weakness; pale stools; persistent vaginal spotting; persistent, severe, or recurring headache or dizziness; severe pain or tenderness in the stomach; shortness of breath; slurred speech; sudden severe headache or vomiting; swelling of the fingers, hands, legs, or ankles; unusual or severe vaginal bleeding; unusual tiredness or weakness; vaginal irritation, discharge, or change in secretions; vision changes (eg, sudden vision loss, double vision); yellowing of the skin or eyes (with or without fever).