SPL Set ID: aea483a7-4ce7-4fe5-936c-fd876b4fa3a8

Allopurinol has the following structural formula: Allopurinol is known chemically as 1,5-dihydro-4 H -pyrazolo [3,4-d] pyrimidin-4-one. It is a xanthine oxidase inhibitor which is administered orally. Its solubility in water at 37°C is 80.0 mg/dL and is greater in an alkaline solution. Each tablet for oral administration contains either 100 mg or 300 mg of allopurinol, USP and the following inactive ingredients: colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, pregelatinized starch, sodium lauryl sulfate and sodium starch glycolate. Allopurinol Structural Formula