Xifos Ifosfamide Fosphenytoin Sodium
ModerateFosphenytoin is on the leaflet's list of CYP3A4 inducers, which are medicines that make the liver enzyme CYP3A4 work faster. Ifosfamide is processed by this enzyme. Taking the two together can therefore change how ifosfamide is handled in your body. Tell your doctor or pharmacist that you take fosphenytoin before starting ifosfamide, and don't change any dose yourself.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.