What the FDA labels say about taking them together
Duloxetine and flecainide
Duloxetine's FDA label of May 14, 2024 names flecainide in its drug interactions section; the flecainide label PlainMeds reads does not name duloxetine.
Check it at the source: the duloxetine FDA label on DailyMed (effective May 14, 2024, SUN PHARMACEUTICAL INDUSTRIES, INC.); the flecainide FDA label on DailyMed (effective June 11, 2026, Amneal Pharmaceuticals of New York LLC).
What does the duloxetine label say about flecainide?
Duloxetine label, drug interactionsExamples; TCAs (nortriptyline, amitriptyline, imipramine, desipramine); phenothiazines (thioridazine); Type 1C antiarrhythmics (propafenone, flecainide)
Duloxetine label, warnings and precautionsPotential for DRIZALMA SPRINKLE to Affect Other Drugs Drugs Metabolized by CYP2D6 - Co-administration of DRIZALMA SPRINKLE with drugs that are extensively metabolized by CYP2D6 and that have a narrow therapeutic index, including certain antidepressants (tricyclic antidepressants [TCAs], such as nortriptyline, amitriptyline, and imipramine), phenothiazines and Type 1C antiarrhythmics (e.g., propafenone, flecainide), should be approached with caution.
Source: FDA drug label (DRIZALMA SPRINKLE), SUN PHARMACEUTICAL INDUSTRIES, INC., effective May 14, 2024 (SPL set b41423b8-dfec-4d79-ba3c-e43a87803d85), via openFDA; the full label on DailyMed
What does the flecainide label say about duloxetine?
Flecainide's label (effective June 11, 2026) does not name duloxetine in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Flecainide Acetate), Amneal Pharmaceuticals of New York LLC, effective June 11, 2026 (SPL set ee9595d5-08a1-4529-9215-ddc3c7f929c4), 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
| Duloxetine | Flecainide | |
|---|---|---|
| Labeled for | Depression, Anxiety, Nerve pain and fibromyalgia, Pain | n/a |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | $0.102 per capsule 30 mg capsule | $0.171 per tablet 100 mg tablet |
| Shortage now | No current entry | No current entry |
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