Verinurad is an inhibitor of urate anion transporter 1 (URAT1; IC50 = 0.025 μM for the human transporter). It is selective for human URAT1 over rat URAT1 (IC50 = 41 μM), as well as human organic anion transporter 1 (OAT1) and OAT4 (IC50s = 4.6 and 5.9 μM, respectively).