Der kræves ingen dosisjustering for warfarin og tilsvarende orale antikoagulantia ved initiering af bosentan, men der anbefales en forstærket monitorering af INR, især i starten og i optitreringsperioden.
No dose adjustment is needed for warfarin and similar oral anticoagulant agents when bosentan is initiated but intensified monitoring of INR is recommended, especially during bosentan initiation and the up-titration period.