5 itraconazol, ritonavir, clarithromycin) muligvis ændre sitagliptins farmakokinetik hos patienter med svær nyreinsufficiens eller ESRD.
For this reason, it is possible that potent CYP3A4 inhibitors (i. e., ketoconazole, itraconazole, ritonavir, clarithromycin) could alter the phamacokinetics of sitagliptin in patients with severe renal insufficiency or ESRD.