The drug is approved for use in adults, and rarely, in some children. Allopurinol’s drug classification is a xanthine oxidase inhibitor. Allopurinol oral tablets are available in two strengths: 100 ...

The comparative efficacy of these therapies has been extended to patients with stage 3 chronic kidney disease, a common comorbidity in gout. Allopurinol and febuxostat are similarly effective in ...