Drug Interaction Report

Some of the medication in roflumilast topical may be absorbed into the bloodstream following local application. It is possible that use of entrectinib may further increase blood levels of the medication by interfering with its clearance from your body. You may be more likely to experience side effects of roflumilast topical such as diarrhea, headache, insomnia, nausea, upper respiratory tract infection, or urinary tract infection. Let your doctor know if side effects become excessive or intolerable. Your doctor may be able to prescribe alternatives that do not interact. 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.

Do not consume grapefruit, grapefruit juice, or Seville oranges during treatment with entrectinib. Doing so can significantly increase the blood levels of entrectinib and increase the risk and/or severity of side effects such as dizziness; confusion; hallucinations; problems with concentration, attention, thinking, and memory; mood changes; insomnia; drowsiness; liver problems; increased uric acid levels in the blood (hyperuricemia); congestive heart failure; fluid retention and swelling; changes in electrical activity of the heart (a condition known as QT prolongation, which may lead to irregular heart rhythm that can be life-threatening); vision problems; and low red or white blood cell counts. Talk to your doctor 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.