Interaktionsforsøg med itraconzol og ketoconazol, to CYP3A4 inhibitorer, viste at maximum plasmakoncentrationerne for telithromycin steg henholdsvis 1, 22 og 1, 51 gange og AUC henholdsvis 1, 54 og 2, 0 gange.
Interaction studies with itraconazole and ketoconazole, two CYP3A4 inhibitors, showed that maximum plasma concentrations of telithromycin were increased respectively by 1.22 and 1.51 fold and AUC by respectively 1.54 fold and 2.0 fold.