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According to the FDA's data on Coumadin®*, side-effects are not common, but they can occur. Coumadin® may turn your urine red-orange;
this effect is harmless. If you think your urine contains blood, call
your doctor immediately.
Tell your doctor if any of these side-effects are severe or do not go away:
· headache
· upset stomach
· diarrhea
· fever
· skin rash
If you experience any of the following side-effects, call your doctor immediately:
· unusual bleeding or bruising
· black or bloody stools
· blood in the urine
· tiredness
· unexplained fever
· chills
· sore throat
· stomach pain