Allopurinol (Zyloprim) is in a class of medications called xanthine oxidase inhibitors.

Ask your doctor or pharmacist for more information and take exactly as driected.

CHECK WITH YOUR DOCTOR AS SOON AS POSSIBLE if you experience a skin rash, skin sores, itching, hives, painful urination, blood in urine, fever, irritation of the eyes, or swelling of lips or mouth.

If you notice other effects not listed above, contact your doctor, nurse, or pharmacist.

Tell your doctor and pharmacist if you are allergic to allopurinol or any other medications.

Tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking. Be sure to mention any of the following: amoxicillin (Amoxil, Trimox); ampicillin (Polycillin, Principen); anticoagulants ('blood thinners') such as warfarin (Coumadin); cancer chemotherapy drugs such as cyclophosphamide (Cytoxan) and mercaptopurine (Purinethol); chlorpropamide (Diabinese); diuretics ('water pills'); medications that suppress the immune system such as azathioprine (Imuran) and cyclosporine (Neoral, Sandimmune); other medications for gout such as probenecid (Benemid) and sulfinpyrazone (Anturane); and tolbutamide (Orinase).

If overdose is suspected, contact your local poison control center or emergency room immediately.

Talk to your doctor about the possible risks of using Allopurinol (Zyloprim) medication for your condition.

Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

Allopurinol (Zyloprim) is a hyperuricemic agent used to treat gout and to prevent certain kidney stones from reforming.

Allopurinol (Zyloprim) is used to treat gout, high levels of uric acid in the body caused by certain cancer medications, and kidney stones. It works by reducing the production of uric acid in the body.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

Store it at room temperature and away from excess heat and moisture.

Before taking Allopurinol (Zyloprim):

Your doctor may need to change the doses of your medications or monitor you carefully for side effects.

Tell your doctor if you have or have ever had kidney or liver disease or heart failure.

Tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding.

If you become pregnant while taking Allopurinol (Zyloprim), call your doctor.

Do not drive a car or operate machinery until you know how this medication affects you.

Ask your doctor about the safe use of alcoholic beverages while you are taking Allopurinol (Zyloprim).