En selektiv inhibitor af CYP3A4, ketoconazol (200 mg dagligt), øgede tadalafil (10 mg dosis) eksponeringen (AUC) 2 gange og Cmax med 15% i forhold
A selective inhibitor of CYP3A4, ketoconazole (200 mg daily), increased tadalafil (10 mg) exposure (AUC) 2-fold and Cmax by 15%, relative to the AUC and Cmax values for tadalafil alone.