This is a Phase 3 extension study to assess the long-term efficacy and safety of lesinurad in combination with febuxostat in subjects who completed the double-blind treatment period in Study RDEA594-304.

Read more: http://www.clinicaltrials.gov/ct2/show/NCT01808144?cond=%22Arthritis%22&lup_s=08/23/2013&lup_d=30