Drug Interactions between erythromycin and ponatinib

Food decreases the levels of erythromycin in your body. Take erythromycin on an empty stomach at least 30 minutes before or 2 hours after a meal. This will make it easier for your body to absorb the medication. However, some erythromycin products may be taken without regard to meals. Ask your healthcare provider about your particular prescription if you are uncertain of how to take it. Grapefruits and grapefruit juice may increase erythromycin levels but how this may affect you is not known. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.

Do not consume grapefruit, grapefruit juice, or any supplements that contain grapefruit extract during treatment with PONATinib unless directed otherwise by your doctor. Grapefruit juice can increase the blood levels of PONATinib. You may be more likely to experience side effects such as nausea; vomiting; abdominal pain; constipation; skin rash; mouth sores; high blood pressure; blood clots; fluid retention; heart failure; liver damage; and impaired bone marrow function resulting in low numbers of different types of blood cells, which can increase the risk of anemia, bleeding problems and infections. You should contact your doctor immediately if you develop sudden dizziness, fainting, chest pain, palpitation, shortness of breath, weakness on one side of the body, speech impairment, leg pain or swelling, or any signs of infection, as these may be symptoms of potentially serious side effects associated with PONATinib. You should also seek prompt medical attention if you have signs and symptoms of liver damage such as fever, chills, joint pain or swelling, unusual bleeding or bruising, skin rash, itching, loss of appetite, fatigue, nausea, vomiting, dark colored urine, light colored stools, and yellowing of the skin or eyes. 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.

Information for this minor interaction is available on the professional version.