What side effects may I notice from receiving Letrozole?

Side effects that you should report to your doctor or health care professional as soon as possible:

-allergic reactions like skin rash, itching, or hives
-bone fracture
-chest pain
-signs and symptoms of a blood clot such as breathing problems; changes in vision; chest pain; severe, sudden headache; pain, swelling, warmth in the leg; trouble speaking; sudden numbness or weakness of the face, arm or leg
-vaginal bleeding


Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

-bone, back, joint, or muscle pain
-dizziness
-fatigue
-fluid retention
-headache
-hot flashes, night sweats
-nausea
-weight gain

This list may not describe all possible side effects for Letrozole. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.