Warfarin clinical trials
Warfarin is named as an intervention in 20 current clinical trials in our China, South Korea, Germany, Denmark, Belgium, Canada, Brazil, UK, USA, Poland, Spain, Italy, Netherlands, Australia, Sweden, Japan and Israel registers. 15 are recruiting patients now. The most common phase is Phase 4. The sponsor with the most trials is Population Health Research Institute (2). The most-studied condition is Ischemic Stroke.
Where Warfarin is approved
All regulators →Of the three regulators tracked here, the first to approve Warfarin was the US, on 8 Jun 1954. It is approved in 2 of the 3 regulators tracked here.
From the regulators' own registers: FDA Drugs@FDA, the EMA medicines list and Health Canada's Notice of Compliance database. Dates are the first listed approval of a product containing only this substance; combination products and nationally authorised EU medicines are not counted.
What health systems spend on Warfarin
All medicines →From NHSBSA Prescription Cost Analysis (Open Government Licence v3.0) and CMS State Drug Utilization Data. Both are gross amounts: neither system publishes its discounts or rebates per drug. Products combining several substances are not counted here.
How Warfarin works
All drug targets →- Vitamin k epoxide reductase complex subunit 1 isoform 1 inhibitor InhibitorTarget: VKORC1 vitamin K epoxide reductase complex subunit 1✓ In ChEMBL and the Guide to Pharmacology
- Portal vein thrombosisPhase 3
- ST Elevation Myocardial InfarctionPhase 3
- ThrombocytopeniaPhase 3
- ThromboembolismPhase 3
- Acute myocardial infarctionPhase 3
- AtherosclerosisPhase 3
- Cervical artery dissectionPhase 3
- Congestive heart failurePhase 3
- Deep vein thrombosisPhase 3
- Diabetes mellitusPhase 3
Mechanisms and diseases from ChEMBL via the Open Targets Platform (release 26.09), ChEMBL record CHEMBL1464, CC BY-SA 3.0. Targets checked against the IUPHAR/BPS Guide to PHARMACOLOGY (2026.3.1), ligand 6853, CC BY-SA 4.0. Trial phases are not approvals: approved uses are shown from the regulators' own records where we hold them.
Patient leaflets for Warfarin
The package leaflet is the official guide for patients that comes with every medicine. These links go to the regulators that publish it.
- IEIreland: 3 products on the HPRA listEach product record links to the HPRA, which publishes the leaflet and SmPC.
- UKUnited Kingdom: Search MHRA ProductsPatient information leaflets and SmPCs for UK-licensed products.
- USUnited States: Search DailyMedFDA-approved labels, including patient and medication guides.
Leaflets differ between brands and countries; always read the one that comes with your own medicine. This is regulatory information, not medical advice.
Reference identifiers for Warfarin
- ChEMBL
- CHEMBL1464
- DrugBank
- DB00682
- PubChem CID
- 54678486
- CAS number
- 81-81-2
- FDA UNII
- 5Q7ZVV76EI
- Wikidata
- Q407431
Codes that identify this medicine in other databases, from Wikidata (CC0), matched by its ChEMBL ID. The ATC code is the WHO classification of what the medicine is used for.
Trials by status
Trials by phase
Clinical trials of Warfarin
20 trialsRegisters list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
Warfarin across our data
Ireland · EU · USThe same active substance in our other registers, matched by its exact name. Each entry links to the register record it comes from.
Licensed in Ireland (HPRA)
3 single-substance products containing Warfarin on the HPRA medicines list.
- Warfant 1 mg TabletsMercury Pharmaceuticals (Ireland) Ltd · PA0073/139/001 · Marketed
- Warfant 3 mg TabletsMercury Pharmaceuticals (Ireland) Ltd · PA0073/139/002 · Marketed
- Warfant 5 mg TabletsMercury Pharmaceuticals (Ireland) Ltd · PA0073/139/003 · Marketed
Supply shortages
No entry for Warfarin in the EMA, FDA or German BfArM shortage lists we track.
Conditions studied with Warfarin
42 conditionsAll 42 conditions
| Condition (as registered) | Trials |
|---|---|
| Ischemic Stroke | 2 |
| Active Ulcerative Colitis | 1 |
| Bleeding Post-mechanical Valve Replacement | 1 |
| Thromboembolism Post-mechanical Valve Replacement | 1 |
| Pulmonary Embolism | 1 |
| Venous Thromboembolism | 1 |
| Mitral Valve Repair Surgery | 1 |
| Anticoagulation | 1 |
| Coronary Endarterectomy | 1 |
| Kawasaki Disease | 1 |
| Coronary Artery Aneurysm | 1 |
| Overweight | 1 |
| Obesity | 1 |
| Overweight Subject | 1 |
| Healthy Subjects | 1 |
| Aortic Regurgitation Disease | 1 |
| Large-Artery Atherosclerosis (Embolus/Thrombosis) | 1 |
| Bleeding Post Cardiac Surgery | 1 |
| Indication for Anticoagulation | 1 |
| Left Ventricular Thrombus | 1 |
| Acute Myocardial Infarction | 1 |
| Aortic Valve Stenosis | 1 |
| Cardiovascular Diseases | 1 |
| Heart Diseases | 1 |
| Heart Valve Diseases | 1 |
| Atrial Fibrillation and Flutter | 1 |
| Stroke | 1 |
| Major Bleed | 1 |
| End-stage Renal Disease | 1 |
| Atrium; Fibrillation | 1 |
| Chronic Kidney Diseases | 1 |
| Valve Replacement Surgery | 1 |
| Antiphospholipid Syndrome | 1 |
| Transient Ischemic Attack | 1 |
| Cerebrovascular Disease | 1 |
| AORTIC VALVE DISEASES | 1 |
| Thromboembolism | 1 |
| Advanced Heart Failure | 1 |
| Left Ventricular Assist Devices | 1 |
| Anticoagulation Treatment | 1 |
| Bleeding Complications | 1 |
| Healthy | 1 |
Sponsors
lead sponsor per trial+ 2 more sponsors in the trial list above.
By country register
A trial with sites in more than one country appears in each of those registers.
Related compounds
Questions about Warfarin trials
How many clinical trials are testing Warfarin?
20 current trials in our China, South Korea, Germany, Denmark, Belgium, Canada, Brazil, UK, USA, Poland, Spain, Italy, Netherlands, Australia, Sweden, Japan and Israel registers name Warfarin (also registered as SUB05128MIG) as a drug or biological intervention, as of the registry sync on 10 November 2026. Completed and withdrawn studies are not counted.
Are Warfarin trials recruiting patients?
Yes. 15 of the 20 trials are recruiting: 7 with sites in China, 3 with sites in South Korea, 3 with sites in Germany, 2 with sites in Denmark, 2 with sites in Belgium, 2 with sites in Canada, 2 with sites in Brazil, 1 with sites in UK, 1 with sites in USA, 1 with sites in Poland, 1 with sites in Spain, 1 with sites in Italy, 1 with sites in Netherlands, 1 with sites in Australia, 1 with sites in Sweden, 1 with sites in Japan and 1 with sites in Israel. Eligibility and site contacts are on each trial's record. Only the study team can confirm whether a patient is eligible.
Who sponsors Warfarin clinical trials?
Population Health Research Institute (2), Hangzhou Zhongmei Huadong Pharmaceutical Co., Ltd (2), Asan Medical Center (2) and Hoffmann-La Roche (1), among 17 lead sponsors in total. The number in brackets is how many trials each organisation leads.
Is Warfarin licensed in Ireland?
Yes. The HPRA medicines list includes 3 single-substance products containing Warfarin, for example Warfant 1 mg Tablets (Mercury Pharmaceuticals (Ireland) Ltd). A licence does not mean a product is currently marketed or reimbursed; see each product's record.
Is there a Warfarin shortage?
Not in the lists we track: Warfarin has no entry in the EMA, FDA or German BfArM shortage registers as of their latest sync.
Where does this information come from?
Every trial, status, phase and sponsor on this page is copied from public ClinicalTrials.gov records by a daily sync. Nothing here describes how Warfarin works or whether it is effective, and it is not medical advice.
How this page is built
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how Warfarin works or whether it is effective. Each trial links to its own record so you can check it yourself.
- ClinicalTrials.gov (U.S. National Library of Medicine) ↗ Trial IDs, titles, intervention names and synonyms, phase, overall status, lead sponsor and conditions for every trial on this page
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists Warfarin (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 10 Nov 2026. How every register is built: methodology · fixes we have made: corrections log.