Febuxostat 40 mg tablet is indicated for the chronic management of hyperuricemia in patients with gout, contraindicated in patients with a history of hypersensitivity to febuxostat or those with severe liver impairment, common side effects may include liver function test abnormalities, nausea, and rash, and it may interact with medications such as azathioprine and mercaptopurine, requiring dose adjustments.