What the FDA labels say about taking them together
Amiodarone and diltiazem
Amiodarone's FDA label of December 9, 2025 names diltiazem in its drug interactions section; the diltiazem labels PlainMeds reads (4) do not name amiodarone. The amiodarone label: “Potentiates the electrophysiologic and hemodynamic effects of amiodarone, resulting in bradycardia, sinus arrest, and AV block. Monitor heart rate.”
Check it at the source: the amiodarone FDA label on DailyMed (effective December 9, 2025, Chartwell RX, LLC); the diltiazem FDA label on DailyMed (effective August 7, 2026, Bausch Health US, LLC).
What does the amiodarone label say about diltiazem?
Amiodarone label, drug interactionsConcomitant Drug/Class/Name: Negative Chronotropes; Examples: digoxin, beta blockers, verapamil, diltiazem, clonidine, ivabradine; Clinical Comment: Potentiates the electrophysiologic and hemodynamic effects of amiodarone, resulting in bradycardia, sinus arrest, and AV block. Monitor heart rate.
Source: FDA drug label (Amiodarone Hydrochloride), Chartwell RX, LLC, effective December 9, 2025 (SPL set 5520f11d-968d-4f4f-bf57-d14369c0d746), via openFDA; the full label on DailyMed
What does the diltiazem label say about amiodarone?
Diltiazem's label (effective August 7, 2026) and its 3 other brand-application labels do not name amiodarone in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (TIAZAC EXTENDED RELEASE), Bausch Health US, LLC, effective August 7, 2026 (SPL set c567fe7e-887e-4291-a0d1-2dd3f25cbf25), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Amiodarone | Diltiazem | |
|---|---|---|
| Labeled for | n/a | High blood pressure, Angina, Atrial fibrillation |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $0.122 per tablet 200 mg tablet | $0.144 per capsule 24h ER(cd) 120 mg capsule |
| Shortage now | No current entry | A presentation being discontinued |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once