Macitentan and its active metabolite are not inhibitors of hepatic or renal uptake transporters at
clinically relevant concentrations, including the organic anion transporting polypeptides (OATP1B1
and OATP1B3). Macitentan and its active metabolite are not relevant substrates of OATP1B1 and
OATP1B3, but enter the liver by passive diffusion.