Rabeprazole and Amoxicillin Interaction
Drug interaction information between Rabeprazole and Amoxicillin.
Rabeprazole and Amoxicillin have a documented major interaction in FDA labeling.
FDA drug labeling documents a major-severity interaction between Rabeprazole and Amoxicillin. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Rabeprazole changes the acid levels in your stomach, which can affect how the antibiotic amoxicillin is absorbed and used by your body.
What To Do
Consult your healthcare provider to ensure these medications are taken correctly for your specific treatment plan.
FDA Label Information
Combination Therapy with Clarithromycin and Amoxicillin Clinical Impact: Concomitant administration of clarithromycin with other drugs can lead to serious adverse reactions, including potentially fatal arrhythmias, and are contraindicated. Amoxicillin also has drug interactions. See Drug Interactions in prescribing information for amoxicillin.
Rabeprazole Also Interacts With
- Clarithromycin major
- Warfarin minor
- Methotrexate minor
- Ketoconazole minor
- Itraconazole minor
Amoxicillin Also Interacts With
- Lansoprazole major
- Theophylline major
- Allopurinol moderate
- Probenecid moderate
- Estradiol minor
Frequently Asked Questions
Can I take Rabeprazole and Amoxicillin together?
This is a major interaction. Consult your healthcare provider to ensure these medications are taken correctly for your specific treatment plan.
How serious is the interaction between Rabeprazole and Amoxicillin?
This interaction is classified as "major" severity by the FDA. Major interactions may be life-threatening or cause serious side effects.
Why do Rabeprazole and Amoxicillin interact?
Rabeprazole changes the acid levels in your stomach, which can affect how the antibiotic amoxicillin is absorbed and used by your body.
Understanding the Rabeprazole and Amoxicillin Interaction
FDA-approved prescribing information for these two drugs flags their combination as a major-severity interaction. Rabeprazole belongs to the Proton Pump Inhibitor (PPI) class and Amoxicillin belongs to the Penicillin Antibiotic class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Rabeprazole changes the acid levels in your stomach, which can affect how the antibiotic amoxicillin is absorbed and used by your body. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Rabeprazole has 7 total documented interactions on file in this dataset, and Amoxicillin has 12. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Consult your healthcare provider to ensure these medications are taken correctly for your specific treatment plan. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Rabeprazole or Amoxicillin based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.