Plasmakoncentrationerne af doxorubicin og dets metabolit, doxorubicinol, kan forøges, når doxo - rubicin indgives sammen med cyclosporin, verapamil, paclitaxel eller andre stoffer, der hæmmer P - glycoprotein (P- gP).
Plasma levels of doxorubicin and its metabolite, doxorubicinol, may be increased when doxorubicin is administered with cyclosporin, verapamil, paclitaxel or other agents that inhibit P-glycoprotein (P-Gp).