Hydroxywarfarin metabolites potently inhibit CYP2C9 metabolism of S-warfarin.
Jones DR, Kim SY, Guderyon M, Yun CH, Moran JH, Miller GP. Hydroxywarfarin metabolites potently inhibit CYP2C9 metabolism of S-warfarin. Chem Res Toxicol. 2010 May 17; 23(5):939-45.