Zyrik 100 Tablet contains Allopurinol 100mg, a xanthine oxidase inhibitor used primarily to reduce elevated serum uric acid levels in patients with gout and certain types of kidney stones. By inhibiting xanthine oxidase, Allopurinol decreases the production of uric acid, thereby preventing the formation of urate crystals that cause inflammation and pain in gouty arthritis. It is also indicated for the management of hyperuricemia associated with malignancies undergoing chemotherapy, where rapid cell turnover leads to increased uric acid production. Zyrik 100 is typically prescribed for long-term use to maintain lower uric acid levels and prevent acute gout attacks. The dosage should be individualized based on renal function and serum uric acid levels, with gradual titration to minimize adverse effects. Common side effects include rash, gastrointestinal disturbances, and hypersensitivity reactions, which require prompt medical attention. Regular monitoring of renal and liver function tests is recommended during therapy. Zyrik 100 should be used cautiously in patients with renal impairment and hypersensitivity to Allopurinol. It is contraindicated in patients with known hypersensitivity to the drug. This medication should be taken under medical supervision to ensure optimal therapeutic outcomes and minimize risks.