Ponatinib and Omeprazole: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Ponatinib
Omeprazole
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Here's what's going on: Ponatinib (Iclusig) is a cancer medicine that dissolves best when your stomach is acidic. Omeprazole (Prilosec) lowers stomach acid. In theory, that could make a little less ponatinib get absorbed, which might make it slightly less effective.
The good news is that in studies the drop was very small, and the two are generally fine to take together. Your care team can keep an eye on how well your ponatinib is working. Please don't stop or change either medicine on your own. If you have questions, just check with your pharmacist or doctor.
Mechanism: Omeprazole raises gastric pH, and ponatinib solubility is pH-dependent, so absorption may decrease. Neither drug is a prodrug; the direction is reduced ponatinib exposure, potentially lowering efficacy.
Magnitude: With lansoprazole 60 mg (surrogate for PPIs), single-dose ponatinib 45 mg showed AUC decreased ~6% and Cmax ~25% (n=18). Onset rapid; evidence theoretical.
- Clinically minimal change; coadministration is acceptable.
- Monitor for lack of therapeutic response (hematologic/molecular markers per indication).
- Dose may be individualized by the oncology team if response is inadequate.
What happens
Decreased ponatinib efficacy
Interaction Deep Dive
When ponatinib is taken together with drugs that raise gastric pH, its effectiveness may be reduced, since ponatinib solubility depends on pH. In healthy volunteers (n=18), giving a single 45 mg dose of ponatinib alongside lansoprazole 60 mg once daily lowered ponatinib AUC by 6% and Cmax by 25% compared with ponatinib given by itself. Nevertheless, this represents only a minimal change in ponatinib exposure, and ponatinib can still be given with these agents1. Monitoring for a lack of ponatinib response should be considered.
Why it happens (mechanism)
Elevation of gastric pH
How to manage this interaction
The practical picture: This is a minor, theoretical interaction. The reduction in ponatinib levels is small, and these two are generally taken together without a problem.
- Keep taking both as prescribed unless your care team tells you otherwise.
- Your team may monitor a bit more closely to make sure ponatinib is still working well.
- If your dose ever needs changing, that will be individualized by your oncology team.
Bring it up at your next visit, or sooner if you're worried, and ask your pharmacist before starting any new acid-reducing product.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Ponatinib and Omeprazole together?
Omeprazole may slightly lower ponatinib absorption, but the effect is small and the two can usually be taken together while your care team monitors that ponatinib is still working. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Ponatinib and Omeprazole interaction?
It is rated minor. Usually limited clinical impact.
How quickly could this interaction happen?
The documented onset is "rapid". Effects can appear quickly, often within about 24 hours of combining the drugs.
How is the Ponatinib and Omeprazole interaction managed?
The practical picture: This is a minor, theoretical interaction. The reduction in ponatinib levels is small, and these two are generally taken together without a problem. Keep taking both as prescribed unless your care team tells you otherwise. Your team may monitor a bit more closely to make sure ponatinib is still working well. If your dose ever needs changing, that will be individualized by you… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Ponatinib or Omeprazole need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (1)
- Product Information: ICLUSIG(R) oral tablets, ponatinib oral tablets. ARIAD Pharmaceuticals, Inc. (per FDA), Cambridge, MA, 2014. DailyMed
Keep reading about Omeprazole
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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