Drug interactions
Dacomitinib + Rabeprazole
Severity: Major
Dacomitinib and Rabeprazole: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
PPIs lower dacomitinib exposure through reduced absorption. This may reduce efficacy in EGFR-mutated lung cancer.
What this interaction means in plain words
Dacomitinib and Rabeprazole can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Dacomitinib belongs to Oncology; Rabeprazole belongs to Gastrointestinal Tract.
Why it happens
Increased gastric pH reduces dacomitinib solubility and absorption.
What to do
Avoid PPIs. Use a locally acting antacid or an H2 antagonist, giving dacomitinib at least 6 hours before or 10 hours after the H2 antagonist.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Rabeprazole
- Rabeprazole + Rilpivirine Contraindicated
- Acalabrutinib + Rabeprazole Major
- Atazanavir + Rabeprazole Major
- Dasatinib + Rabeprazole Major
- Erlotinib + Rabeprazole Major
- Gefitinib + Rabeprazole Major
Other interactions of Dacomitinib
- Dacomitinib + Thioridazine Contraindicated
- Amitriptyline + Dacomitinib Major
- Atomoxetine + Dacomitinib Major
- Brexpiprazole + Dacomitinib Major
- Clomipramine + Dacomitinib Major
- Dacomitinib + Desipramine Major
Frequently asked questions
Can I take Dacomitinib with Rabeprazole?
MediHelp rates the interaction as major. Dacomitinib and Rabeprazole can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. PPIs lower dacomitinib exposure through reduced absorption. This may reduce efficacy in EGFR-mutated lung cancer.
How serious is the interaction between Dacomitinib and Rabeprazole?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid PPIs. Use a locally acting antacid or an H2 antagonist, giving dacomitinib at least 6 hours before or 10 hours after the H2 antagonist.
What other medicines interact with Rabeprazole?
MediHelp also lists interactions of Rabeprazole with, for example, Rilpivirine, Acalabrutinib, Atazanavir. The full list is on the Rabeprazole page.
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