What the FDA labels say about taking them together
Nevirapine and warfarin
Nevirapine's FDA label of July 15, 2026 names warfarin in its drug interactions section; the warfarin label PlainMeds reads does not name nevirapine. The nevirapine label: “Potential effect on anticoagulation. Monitoring of anticoagulation levels is recommended.”
Check it at the source: the nevirapine FDA label on DailyMed (effective July 15, 2026, Mylan Pharmaceuticals Inc.); the warfarin FDA label on DailyMed (effective May 29, 2026, Amneal Pharmaceuticals LLC).
What does the nevirapine label say about warfarin?
Nevirapine label, drug interactionsDrug Name: Antithrombotics: Warfarin; Effect on Concentration of Nevirapine or Concomitant Drug: Plasma concentrations may be increased.; Clinical Comment: Potential effect on anticoagulation. Monitoring of anticoagulation levels is recommended.
Source: FDA drug label (Nevirapine), Mylan Pharmaceuticals Inc., effective July 15, 2026 (SPL set c6e93829-7024-48f6-8023-da6ff27dfc0a), via openFDA; the full label on DailyMed
What does the warfarin label say about nevirapine?
Warfarin's label (effective May 29, 2026) does not name nevirapine 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
| Nevirapine | Warfarin | |
|---|---|---|
| Labeled for | HIV | Blood clots (DVT and PE), Atrial fibrillation |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.147 per tablet 200 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