The short answer
The added bleeding risk from ginger root powder with dipyridamole is uncertain. Review the exact product, dose and your bleeding history with your prescriber.
What this answer covers
Oral ginger root powder with oral dipyridamole tablets. Exact formulation, dose and duration matter; other antiplatelet medicines and other supplement preparations are not interchangeable.
- Supplement or preparation
- Zingiber Officinale (Ginger) Root Powder
- Medication ingredient
- dipyridamole
What the evidence shows
Human studies of dried or powdered ginger have produced dose-dependent results. A small single-dose 2 g study and a 4 g daily study found no significant measured platelet effect, whereas a separate 10 g dose inhibited aggregation. These were laboratory findings, not proof of bleeding from this combination.
Consider the prescribed treatment
The oral dipyridamole label describes use with warfarin after prosthetic valve replacement. In its cited studies, bleeding was no more frequent or severe than with warfarin alone, although rare increased surgical bleeding was reported. This does not establish safety with a new supplement or apply automatically to an aspirin-containing combination.
Review the exact product
Record the grams of root powder, frequency and other ingredients. Concentrated extracts, fresh ginger and culinary use are not identical to the preparations studied. No tested dose has been established as universally safe or harmful with this prescription medicine.
Know when to get help
Seek urgent care for bleeding that will not stop, vomiting blood or black, tarry stools. Tell your prescriber about the full supplement and medicine list. Do not stop prescribed antiplatelet treatment on your own to accommodate a supplement; ask the treating team to make a plan.
Evidence and practical considerations
Side effects & toxicity
An increased bleeding rate specifically from ginger root powder with dipyridamole has not been established.
- Exact scope
- Oral ginger root powder with oral dipyridamole tablets. Exact formulation, dose and duration matter; other antiplatelet medicines and other supplement preparations are not interchangeable. with Exact dipyridamole RxCUI3521 IN. Oral single-ingredient tablets are distinguished from IV diagnostic use and fixed aspirin/dipyridamole combinations. IV evidence applies only where explicitly stated.
- Medication form and route
- Oral
What remains uncertain
- Available supplement-only and other-drug studies do not establish exact-pair clinical harm or exclude rare events. No validated preventive spacing interval.
Factors that may matter: Exact preparation and dose; Fasting versus fed dosing; Bleeding and ulcer history; Other medicines.
Read the supporting source summaries
Source 1: Current prescribing information
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Prescription oral oral dipyridamole tablets users; short human pharmacology studies where described.
In cited warfarin trials, bleeding was no more frequent or severe than with warfarin alone; rare increased surgical bleeding reported. No pharmacokinetic interaction studies conducted with tablets.
How this applies: Exact current product label. Exact dipyridamole RxCUI3521 IN. Oral single-ingredient tablets are distinguished from IV diagnostic use and fixed aspirin/dipyridamole combinations. IV evidence applies only where explicitly stated.
Oral single-ingredient label, not IV diagnostic use or automatic aspirin-combination equivalence. No botanical bleeding trial.
Source 2: Original clinical research
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Patients with coronary artery disease in the ginger component of a controlled study.
Repeated 4 g daily did not change measured platelet aggregation; the single 10 g dose inhibited aggregation to two agonists.
How this applies: Indirect for oral dipyridamole tablets co-use; exact preparation and endpoint retained.
Abstract-only; platelet endpoint, not clinical bleeding. Background regimen detail incomplete; cannot attribute an exact NSAID interaction.
Source 3: Original clinical research
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Eight healthy male volunteers.
No difference in bleeding time, platelet count, thromboelastography or measured aggregation.
How this applies: Indirect for oral dipyridamole tablets co-use; exact preparation and endpoint retained.
Abstract-only, very small and single-dose. No exact drug combination or universal safe dose established.
Source 4: Medication terminology
rxnav.nlm.nih.gov · Source check Sep 10, 2026
Population: Terminology.
dipyridamole is IN.
How this applies: Exact identity.
Not clinical evidence.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Sources checked and article drafted. | |
| Research summary published |
Article revision: d1122af4848d1212
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.