Alopurinol Treatment for Chronic Gout
Introduction to Alopurinol
- The American College of Rheumatology strongly recommends allopurinol as the first-line treatment for chronic gout due to its efficacy, safety, and cost-effectiveness 1, 2
Fundamentals for Alopurinol Use
- Allopurinol is a xanthine oxidase inhibitor that effectively reduces serum uric acid levels by inhibiting its formation, promoting crystal dissolution, and preventing new crystal formation 3, 4
- The American College of Rheumatology guidelines from 2020 strongly recommend allopurinol as the preferred first-line agent for all patients with gout, including those with moderate to severe chronic kidney disease (stage ≥3) 1, 2
- The therapeutic goal of hypouricemic treatment is to maintain serum uric acid below the saturation point for monosodium urate (360 μmol/L or 6 mg/dL) 3, 5
Dosage and Adjustment
- It is recommended to start with low doses (100 mg daily or less in patients with renal insufficiency) and gradually increase by 100 mg every 2-4 weeks until the target serum uric acid level is reached 3, 2
- Doses above 300 mg daily are often necessary to achieve target urate levels, with doses up to 800 mg daily approved by the FDA 2, 5
Profilaxis during Treatment Initiation
- It is strongly recommended to initiate concomitant anti-inflammatory prophylaxis (colchicine 0.5-1 mg daily and/or an NSAID with gastric protection if indicated) during the first months of hypouricemic therapy to prevent acute attacks 3, 2
- Prophylaxis should be continued for 3-6 months, with ongoing evaluation and extension as necessary if the patient continues to experience attacks 2
Alternatives to Alopurinol
- Uricosuric agents such as probenecid and sulfinpyrazone can be used as an alternative to allopurinol in patients with normal renal function, but are relatively contraindicated in patients with urolithiasis 3, 6
- Benzbromarone can be used in patients with mild to moderate renal insufficiency, but carries a small risk of hepatotoxicity 3, 6