Caution is advised in patients receiving other medicinal products that may affect renal function or are excreted renally (e. g. cyclosporin and tacrolimus, intravenous aminoglycosides, amphotericin B, foscarnet, pentamidine, vancomycin, or medicinal products which are secreted by the same renal transporter, human Organic Anion Transporter 1 (hOAT1), such as cidofovir).