What the FDA labels say about taking them together
Artemether/lumefantrine and flecainide
Artemether/lumefantrine's FDA label of March 26, 2026 names flecainide in its drug interactions section; the flecainide label PlainMeds reads does not name artemether/lumefantrine. The artemether/lumefantrine label: “Many of the drugs metabolized by CYP2D6 can prolong the QT interval and should not be administered with Coartem Tablets due to the potential additive effect on the QT interval.”
Check it at the source: the artemether/lumefantrine FDA label on DailyMed (effective March 26, 2026, Novartis Pharmaceuticals Corporation); the flecainide FDA label on DailyMed (effective June 11, 2026, Amneal Pharmaceuticals of New York LLC).
What does the artemether/lumefantrine label say about flecainide?
Artemether/lumefantrine label, drug interactionsMany of the drugs metabolized by CYP2D6 can prolong the QT interval and should not be administered with Coartem Tablets due to the potential additive effect on the QT interval (e.g., flecainide, imipramine, amitriptyline, clomipramine) [see Warnings and Precautions (5.1, 5.4) and Clinical Pharmacology (12.3)].
Source: FDA drug label (COARTEM), Novartis Pharmaceuticals Corporation, effective March 26, 2026 (SPL set 7866ec19-dfac-47d4-a53f-511a12643cbf), via openFDA; the full label on DailyMed
What does the flecainide label say about artemether/lumefantrine?
Flecainide's label (effective June 11, 2026) does not name artemether/lumefantrine 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
| Artemether/lumefantrine | Flecainide | |
|---|---|---|
| Labeled for | n/a | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $5.36 per tablet Coartem tablets | $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