Drug interactions
Dacomitinib + Esomeprazole
Severity: Major
Dacomitinib and Esomeprazole: 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
Esomeprazole lowers dacomitinib exposure, which may reduce its effectiveness in lung cancer. The effect is mainly loss of efficacy rather than toxicity.
What this interaction means in plain words
Dacomitinib and Esomeprazole 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; Esomeprazole belongs to Gastrointestinal Tract.
Why it happens
Sustained gastric acid suppression by the PPI decreases the absorption of dacomitinib.
What to do
Avoid PPIs with dacomitinib. If acid suppression is needed, use a locally acting antacid or give dacomitinib at least 6 hours before or 10 hours after an H2-receptor 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 Esomeprazole
- Esomeprazole + Mavacamten Contraindicated
- Esomeprazole + Rilpivirine Contraindicated
- Acalabrutinib + Esomeprazole Major
- Atazanavir + Esomeprazole Major
- Citalopram + Esomeprazole Major
- Clopidogrel + Esomeprazole 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 Esomeprazole?
MediHelp rates the interaction as major. Dacomitinib and Esomeprazole 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. Esomeprazole lowers dacomitinib exposure, which may reduce its effectiveness in lung cancer. The effect is mainly loss of efficacy rather than toxicity.
How serious is the interaction between Dacomitinib and Esomeprazole?
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 with dacomitinib. If acid suppression is needed, use a locally acting antacid or give dacomitinib at least 6 hours before or 10 hours after an H2-receptor antagonist.
What other medicines interact with Esomeprazole?
MediHelp also lists interactions of Esomeprazole with, for example, Mavacamten, Rilpivirine, Acalabrutinib. The full list is on the Esomeprazole page.
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