What the FDA labels say about taking them together
Aspirin/dipyridamole and warfarin
Aspirin/dipyridamole's FDA label of January 5, 2026 names warfarin in its drug interactions section; warfarin's label does not name aspirin/dipyridamole itself but warns about its class (NSAIDs (nonsteroidal anti-inflammatory drugs), platelet aggregation inhibitors). The aspirin/dipyridamole label: “Aspirin can displace warfarin from protein binding sites, leading to prolongation of both the prothrombin time and the bleeding time.”
Check it at the source: the aspirin/dipyridamole FDA label on DailyMed (effective January 5, 2026, Glenmark Pharmaceuticals Inc., USA); the warfarin FDA label on DailyMed (effective May 29, 2026, Amneal Pharmaceuticals LLC).
What does the aspirin/dipyridamole label say about warfarin?
Aspirin/dipyridamole label, drug interactionsAspirin can displace warfarin from protein binding sites, leading to prolongation of both the prothrombin time and the bleeding time.
Source: FDA drug label (ASPRIN AND EXTENDED-RELEASE DIPYRIDAMOLE), Glenmark Pharmaceuticals Inc., USA, effective January 5, 2026 (SPL set 467d6ce3-bc05-4aa1-87cc-3214fd628d39), via openFDA; the full label on DailyMed
What does the warfarin label say about aspirin/dipyridamole?
Warfarin's label does not name aspirin/dipyridamole itself; it warns about its class (NSAIDs (nonsteroidal anti-inflammatory drugs), platelet aggregation inhibitors):
Warfarin label, drug interactionsDrugs that Can Increase the Risk of Bleeding Drug Class Specific Drugs Anticoagulants argatroban, dabigatran, bivalirudin, desirudin, heparin, lepirudin Antiplatelet Agents aspirin, cilostazol, clopidogrel, dipyridamole, prasugrel, ticlopidine Nonsteroidal Anti-Inflammatory Agents celecoxib, diclofenac, diflunisal, fenoprofen, ibuprofen, indomethacin, ketoprofen, ketorolac, mefenamic acid, naproxen, oxaprozin, piroxicam, sulindac Serotonin Reuptake Inhibitors citalopram, desvenlafaxine, duloxetine, escitalopram …
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
| Aspirin/dipyridamole | Warfarin | |
|---|---|---|
| Labeled for | Stroke prevention | Blood clots (DVT and PE), Atrial fibrillation |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | $0.559 per unit 25-200 mg | $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