Topiroxostat (INN; trade names Topiloric, Uriadec) is a drug for the treatment of gout and hyperuricemia. It was approved for use in Japan in June 2013. Topiroxostat (INN; trade names Topiloric, Uriadec) is a drug for the treatment of gout and hyperuricemia. It was approved for use in Japan in June 2013. Topiroxostat is a xanthine oxidase inhibitor which reduces serum urate levels.