This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug, changing your diet or commencing any course of treatment.
Very important. A change in your diet, medicine, or dosage may be necessary. Promptly consult your doctor or pharmacist.
How the interaction occurs:
Grapefruit and Seville oranges may slow down how quickly your body processes ivacaftor.
What might happen:
The amount of ivacaftor in your blood may increase and cause more side effects than normal.
What you should do about this interaction:
While you are taking this medicine, you should not eat grapefruit or Seville oranges or drink grapefruit or Seville juice at any time. You may choose an alternative juice beverage. In the event that you are instructed by a healthcare professional (e.g., doctor, pharmacist, or dietitian) to eat grapefruit or Seville oranges or drink grapefruit or Seville orange juice, you should immediately discuss with your doctor the effects of these fruits on the blood levels of this medicine.Contact your healthcare professional (e.g., doctor or pharmacist) for more information.Your healthcare professionals may be aware of this interaction and may be monitoring you for it. Do not start, stop, or change your medicine or diet before checking with them first.Reference:1.Kalydeco (ivacaftor) US prescribing information. Vertex Pharmaceuticals Incorporated March, 2015.