The most definitive method of diagnosis for acute gouty arthritis is aspiration of the affected joint and examination of the fluid for the characteristic needle-shaped monosodium urate crystals. Treatment is aimed at promptly stopping the attack and reversing complications. Colchicine and various nonsteroidal anti-inflammatory drugs are effective for both treatment and prophylaxis. Antihyperuricemic therapy may be indicated in patients who have had several attacks in a year.