This product should not be administered to individuals known to be hypersensitive to allopurinol or to any of the components of the formulation (Lactose Monohydrate, Potato Starch, Quinoline Yellow, Sunset Yellow Lake, Sodium Starch Glycolate, Magnesium Stearate, Talc, Hydroxypropyl Cellulose, Magnesium Aluminometasilicate, Isopropyl Alcohol).