Drug Interactions between ivacaftor and revumenib

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.

High fat content meals may affect the absorption of revumenib. It is recommended that revumenib be taken while fasting or with a low fat meal (approximately 400 calories, with 25% of calories from fat). Grapefruit juice may also increase the blood levels of revumenib which can increase the risk of an irregular heart rhythm that may be serious and potentially life-threatening. You may be more susceptible if you have a heart condition called congenital long QT syndrome, other cardiac diseases, conduction abnormalities, or electrolyte disturbances (for example, magnesium or potassium loss due to severe or prolonged diarrhea or vomiting). Increased levels of [CS1] may also increase the risk of developing a serious and potentially life-threatening condition called differentiation syndrome. Symptoms of differentiation syndrome include: fever, cough, shortness of breath, severe headache, confusion, dizziness, rapid weight gain, swelling, or decreased urination. You should seek immediate medical attention if you develop any of these symptoms and/or symptoms of QT prolongation such as sudden dizziness, lightheadedness, fainting, shortness of breath, or heart palpitations during treatment with revumenib. The risk and/or severity of other side effects may also increase, including nausea, vomiting, diarrhea, fever or infections. You may need additional monitoring if grapefruit or grapefruit juice are consumed during treatment with revumenib. Talk to a healthcare provider if you have any questions or concerns. 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.