Treatment of chronic hyperuricemia in conditions where urate deposition has already occurred (including a history or presence of tophus &/or gouty arthritis).
Do not use until acute gouty attacks (gout flare) has completely subsided. Not recommended for patients w/ ischemic heart disease or CHF; xanthine deposition (eg malignant disease or Lesch-Nyhan syndrome); altered thyroid function. Perform liver function test prior to treatment & periodically thereafter. Severe renal & hepatic impairment. Childn <18 yr.