De stærke CYP3A4- hæmmere ketoconazol (200 mg en gang daglig) og josamycin (1 g to gange daglig) øgede den gennemsnitlige plasmaeksponering for ivabradin 7- 8 gange.
The potent CYP3A4 inhibitors ketoconazole (200 mg once daily) and josamycin (1 g twice daily) increased ivabradine mean plasma exposure by 7 to 8 fold.