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Nebivolol and Diltiazem Interaction

Drug interaction information between Nebivolol and Diltiazem.

Nebivolol and Diltiazem have a documented minor interaction in FDA labeling.

FDA drug labeling documents a minor-severity interaction between Nebivolol and Diltiazem. 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.

Drug A

Nebivolol

Beta-1 Selective Blocker

Drug B

Diltiazem

Calcium Channel Blocker

How They Interact

Both of these medicines slow the heart rate and lower blood pressure. Using them together can cause your heart to beat too slowly or weaken its pumping strength.

What To Do

Your doctor should closely monitor your heart rate and blood pressure while you are taking this combination.

FDA Label Information

( 7.3 ) Verapamil- or diltiazem-type calcium channel blockers may cause excessive reductions in heart rate, blood pressure, and cardiac contractility. 7.4 Calcium Channel Blockers Nebivolol can exacerbate the effects of myocardial depressants or inhibitors of AV conduction, such as certain calcium antagonists (particularly of the phenylalkylamine [verapamil] and benzothiazepine [diltiazem] classes), or antiarrhythmic agents, such as disopyramide.

Frequently Asked Questions

Can I take Nebivolol and Diltiazem together?

This is a minor interaction. Your doctor should closely monitor your heart rate and blood pressure while you are taking this combination.

How serious is the interaction between Nebivolol and Diltiazem?

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 Nebivolol and Diltiazem interact?

Both of these medicines slow the heart rate and lower blood pressure. Using them together can cause your heart to beat too slowly or weaken its pumping strength.

Understanding the Nebivolol and Diltiazem Interaction

FDA-approved prescribing information for these two drugs flags their combination as a minor-severity interaction. Nebivolol belongs to the Beta-1 Selective Blocker class and Diltiazem belongs to the Calcium Channel Blocker class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Both of these medicines slow the heart rate and lower blood pressure. 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. Nebivolol has 7 total documented interactions on file in this dataset, and Diltiazem has 46. 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 should closely monitor your heart rate and blood pressure while you are taking this combination. 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 Nebivolol or Diltiazem 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.