What side effects may I notice from receiving Lonsurf?

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, swelling of the face, lips, or tongue
-low blood counts - this medicine may decrease the number of white blood cells, red blood cells and platelets. You may be at increased risk for infections and bleeding.
-signs of decreased platelets or bleeding - bruising, pinpoint red spots on the skin, black, tarry stools, blood in the urine
-signs of decreased red blood cells - unusually weak or tired, feeling faint or lightheaded, falls
-signs of infection - fever or chills, cough, sore throat, pain or difficulty passing urine
-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

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

-diarrhea
-loss of appetite
-nausea, vomiting
-stomach pain

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