Plasmaeksponering (AUC og Cmax) for valdecoxib blev øget (henholdsvis 62% og 19%), når det blev administreret sammen med fluconazol (hovedsagelig en CYP2C9 hæmmer), hvilket viser, at dosis af parecoxibnatrium bør reduceres hos de patienter, der er i fluconazolbehandling.
Plasma exposure (AUC and Cmax) to valdecoxib was increased (62% and 19%, respectively) when co- administered with fluconazole (predominantly a CYP2C9 inhibitor), indicating that the dose of parecoxib sodium should be reduced in those patients who are receiving fluconazole therapy.