Drug interactions
Dacomitinib + Pantoprazole
Severity: Major
Dacomitinib and Pantoprazole: 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
Proton pump inhibitors reduce dacomitinib exposure, which may lessen its antitumor efficacy. The effect stems from reduced absorption at higher gastric pH.
What this interaction means in plain words
Dacomitinib and Pantoprazole 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; Pantoprazole belongs to Gastrointestinal Tract.
Why it happens
Higher gastric pH from the proton pump inhibitor reduces dacomitinib solubility and absorption.
What to do
Avoid pantoprazole; if acid suppression is needed, use a locally acting antacid or an H2 blocker with dacomitinib given at least 6 hours before or 10 hours after.
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 Pantoprazole
- Pantoprazole + Rilpivirine Contraindicated
- Acalabrutinib + Pantoprazole Major
- Atazanavir + Pantoprazole Major
- Dasatinib + Pantoprazole Major
- Erlotinib + Pantoprazole Major
- Gefitinib + Pantoprazole 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 Pantoprazole?
MediHelp rates the interaction as major. Dacomitinib and Pantoprazole 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. Proton pump inhibitors reduce dacomitinib exposure, which may lessen its antitumor efficacy. The effect stems from reduced absorption at higher gastric pH.
How serious is the interaction between Dacomitinib and Pantoprazole?
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 pantoprazole; if acid suppression is needed, use a locally acting antacid or an H2 blocker with dacomitinib given at least 6 hours before or 10 hours after.
What other medicines interact with Pantoprazole?
MediHelp also lists interactions of Pantoprazole with, for example, Rilpivirine, Acalabrutinib, Atazanavir. The full list is on the Pantoprazole page.
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