Common/mild (may resolve as your body adjusts): Dizziness or fatigue, headache, mood changes, acne, hair loss or growth, increased appetite, constipation, diarrhea, stomach cramps or bloating, weight changes, breast tenderness or enlargement, vaginal bleeding/spotting, and lowered sex drive.
Serious (seek in-person medical attention): Chest pain, trouble breathing, one-sided weakness, slurred speech, sudden vision changes, swelling of arms or legs, extreme dizziness or fainting, severe mood changes (depression or memory loss), trouble walking, painful or frequent urination, signs of liver problems (dark urine, light-colored stools, vomiting, yellowing of skin or eyes), or breast lumps.