Drug Interaction Report

By reducing the acidity level in the stomach, magnesium oxide may interfere with the absorption of neratinib and reduce its effectiveness. Talk to your doctor or pharmacist if you have any questions or concerns. You may need to adjust the timing of your medication doses to minimize the interaction. It has been recommended to take neratinib three hours after an antacid dose. 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 of neratinib. This may increase the risk and/or severity of side effects such as diarrhea, nausea, vomiting, abdominal pain, mouth sores, loss of appetite, and liver problems. You should avoid the consumption of grapefruit and grapefruit juice during treatment with neratinib. Be sure to take the medication with food at the same time everyday to maintain consistent blood levels and effects. Talk to your doctor or pharmacist if you have questions on how to take this or other medications you are prescribed. 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.