Constipation, diarrhea, nausea, vomiting, upset stomach, loss of appetite, body aches and pains, breast swelling/tenderness/pain, headache, dry mouth, scratchy throat, increased cough, dizziness, trouble sleeping, tiredness/weakness, flushing and sweating (hot flashes/hot flushes), vaginal bleeding, hair thinning, and weight change can occur. Changes in diet such as eating several small meals may help lessen the chance of nausea and vomiting. If any of these effects 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., depression), excessive thirst, numbness/tingling/swelling of the hands or feet, persistent cough, unusual vaginal discharge/burning/itching/odor, unusually stiff muscles, muscle pain, pain/redness/swelling of the arms or legs, vision changes, bone pain, bone fracture, signs of infection (e.g., fever, chills, persistent sore throat).
Seek immediate medical attention if any of these rare but very serious side effects occur: chest pain, jaw/left arm pain, trouble breathing, confusion, fainting, slurred speech, weakness on one side of the body.
A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may 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.