Nateglinide and Rifampin Interaction
Drug interaction information between Nateglinide and Rifampin.
Nateglinide and Rifampin have a documented minor interaction in FDA labeling.
FDA drug labeling documents a minor-severity interaction between Nateglinide and Rifampin. 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
Rifampin causes your body to process and remove nateglinide faster than normal. This can make the medicine less effective at lowering your blood sugar, leading to high blood sugar levels.
What To Do
Your doctor may need to increase your nateglinide dose or monitor your blood sugar levels more often.
FDA Label Information
Drugs and Herbals That May Reduce the Blood-Glucose-Lowering Effect of Nateglinide and Increase Susceptibility to Hyperglycemia Drugs: Thiazides, corticosteroids, thyroid products, sympathomimetics, somatropin, somatostatin analogues (e.g., lanreotide, octreotide), and CYP inducers (e.g., rifampin, phenytoin and St John's Wort).
Nateglinide Also Interacts With
- Clarithromycin major
- Clonidine minor
- Fluconazole minor
- Voriconazole minor
- Amiodarone minor
Rifampin Also Interacts With
- Darunavir major
- Bictegravir/Emtricitabine/Tenofovir major
- Glecaprevir/Pibrentasvir major
- Nirmatrelvir/Ritonavir major
- Pitavastatin major
Frequently Asked Questions
Can I take Nateglinide and Rifampin together?
This is a minor interaction. Your doctor may need to increase your nateglinide dose or monitor your blood sugar levels more often.
How serious is the interaction between Nateglinide and Rifampin?
This interaction is classified as "minor" severity by the FDA. Minor interactions are unlikely to cause significant problems but should still be mentioned to your healthcare provider.
Why do Nateglinide and Rifampin interact?
Rifampin causes your body to process and remove nateglinide faster than normal. This can make the medicine less effective at lowering your blood sugar, leading to high blood sugar levels.
Understanding the Nateglinide and Rifampin Interaction
FDA-approved prescribing information for these two drugs flags their combination as a minor-severity interaction. Nateglinide belongs to the Meglitinide class and Rifampin belongs to the Rifamycin Antibiotic class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Rifampin causes your body to process and remove nateglinide faster than normal. 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. Nateglinide has 9 total documented interactions on file in this dataset, and Rifampin has 137. 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: Your doctor may need to increase your nateglinide dose or monitor your blood sugar levels more often. 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 Nateglinide or Rifampin 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.