What side effects may I notice from receiving Hydroxyurea?

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
-breathing problems
-burning, redness or pain at the site of any radiation therapy
-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, fainting spells, lightheadedness
-signs of infection - fever or chills, cough, sore throat, pain or difficulty passing urine
-signs and symptoms of bleeding such as bloody or black, tarry stools; red or dark-brown urine; spitting up blood or brown material that looks like coffee grounds; red spots on the skin; unusual bruising or bleeding from the eye, gums, or nose
-skin ulcers

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

-constipation
-diarrhea
-loss of appetite
-mouth sores
-nausea

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