What the FDA labels say about taking them together
Nitazoxanide and warfarin
Nitazoxanide's FDA label of October 9, 2025 names warfarin in its drug interactions section; the warfarin label PlainMeds reads does not name nitazoxanide. The nitazoxanide label: “… narrow therapeutic indices, as competition for binding sites may occur (e.g., warfarin).”
Check it at the source: the nitazoxanide FDA label on DailyMed (effective October 9, 2025, Rising Pharma Holdings, Inc.); the warfarin FDA label on DailyMed (effective May 29, 2026, Amneal Pharmaceuticals LLC).
What does the nitazoxanide label say about warfarin?
Nitazoxanide label, drug interactionsTherefore, monitor for adverse reactions when administering nitazoxanide concurrently with other highly plasma protein-bound drugs with narrow therapeutic indices, as competition for binding sites may occur (e.g., warfarin).
Source: FDA drug label (Nitazoxanide), Rising Pharma Holdings, Inc., effective October 9, 2025 (SPL set c0dc0656-3c46-43f9-adea-5285c522cef8), via openFDA; the full label on DailyMed
What does the warfarin label say about nitazoxanide?
Warfarin's label (effective May 29, 2026) does not name nitazoxanide in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Warfarin Sodium), Amneal Pharmaceuticals LLC, effective May 29, 2026 (SPL set 558b7a0d-5490-4c1b-802e-3ab3f1efe760), 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
| Nitazoxanide | Warfarin | |
|---|---|---|
| Labeled for | Diarrhea | Blood clots (DVT and PE), Atrial fibrillation |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $82.20 per tablet 500 mg tablet | $0.093 per tablet 2 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