Hey lalu0005, how are you doing?
Not trying to confuse you, but according to zyloprim drug information,
you should:
stop taking this medicine and check with your doctor immediately if any of the following side effects occur:
* more common
o skin rash or sores, hives, or itching
* rare
o black, tarry stools; bleeding sores on lips; blood in urine or stools; chills, fever, muscle aches or pains, nausea, or vomiting—especially if occurring with or shortly after a skin rash; difficult or painful urination; pinpoint red spots on skin; redness, tenderness, burning, or peeling of skin; red and/or irritated eyes; red, thickened, or scaly skin; shortness of breath, troubled breathing, tightness in chest, or wheezing; sores, ulcers, or white spots in mouth or on lips; sore throat and fever; sudden decrease in amount of urine; swelling in upper abdominal (stomach) area; swelling of face, fingers, feet, or lower legs ; swollen and/or painful glands; unusual bleeding or bruising; unusual tiredness or weakness; weight gain (rapid); yellow eyes or skin
for more information on allopurinol (systemic) side effects and precautions, please vist national library of medicine (www.Nlm.Nih.Gov).
Best wishes,