Samtidig administration af fluconazol, som hovedsagligt hæmmer CYP2C9, men også i en vis udstrækning CYP3A4, kan medføre store forøgelser af plasmakoncentrationerne af bosentan.
Concomitant administration with fluconazole, which inhibits mainly CYP2C9, but to some extent also CYP3A4, could lead to large increases in plasma concentrations of bosentan.