Drug Interaction Report

Ivacaftor may increase the blood levels of everolimus. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Let your doctor know if your condition changes or you experience new or worsening side effects of everolimus such as mouth ulcers, fever, infection, shortness of breath, diarrhea, dizziness, paleness, fainting, and/or unusual bleeding or bruising while taking these medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Grapefruit juice can increase the blood levels and effects of everolimus. You should not drink grapefruit juice or eat grapefruits during your treatment with everolimus. Orange juice is not expected to interact.

Ivacaftor should be taken with fat-containing foods such as eggs, avocados, nuts, meat, butter, peanut butter, cheese pizza, and whole-milk dairy products to help with its absorption. Do not consume grapefruit juice or any food that contains grapefruit or Seville oranges during treatment with ivacaftor unless directed otherwise by your doctor. Grapefruit juice can significantly increase the blood levels of ivacaftor. This may increase the risk and/or severity of serious side effects such as liver damage. Call your doctor immediately if you have fever, chills, joint pain or swelling, unusual bleeding or bruising, skin rash, itching, loss of appetite, fatigue, nausea, vomiting, abdominal pain, dark urine, pale stools, and/or yellowing of the skin or eyes, as these may be signs and symptoms of liver damage. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.