Drug

Warfarin clinical trials

Also written Coumadin and Jantoven.

studies test it: 142
open now: 8
in phase 3: 22
first study started: 1993

How each study uses Warfarin is sorted by a rule, right about nine times in ten. Readers can ask us to read every study one by one.Ask us to read each study

Get an email when these change. Save the Warfarin studies recruiting or about to start — once a week, free: studies that open, close, add sites or post results.

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Example · made-up studies

Breast cancer · Recruiting: 2 came in, 3 changed

What changed in your saved searches, Oct 31 – Nov 6:

A study of drug A after surgery for early breast cancer

Came in · now Recruiting

Drug B with hormone therapy in advanced breast cancer

Changed

· Sites: 4 added, including Seoul and Busan

· Enrollment: 300 → 450 participants

Exercise during chemotherapy

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Approvals

The first approval found in each region, with its record

United States: 8 Jun 1954 · COUMADIN · NDA 009218 (FDA, Drugs@FDA)
European Union: Not in EMA's list of EU-wide authorisations

From FDA's Drugs@FDA and Purple Book (through openFDA) and the European Medicines Agency, files of Sept 2026 and 27 Oct 2026. National approvals in Europe and other countries are not included. How this is worked out

How studies write it

Studies that test it under each name

Name

Warfarin: 109
Warfarin Sodium: 7
Marevan: 7
Athrombine: 3
PANAWARFIN: 3

Brand

Coumadin: 38
Jantoven: 3
Choice: 1

Development codes

SUB05128MIG: 1

In one entry with another drug

Given together, or one or the other

Drug cocktail: 3
Nadroparin Calcium and Warfarin: 3

Studies by the year they started

139 studies that test it; most in 2016 (12)

Studies that test Warfarin, by start year
Year	Studies
1993	1
1998	2
1999	4
2000	2
2002	3
2003	1
2004	1
2005	6
2006	4
2007	8
2008	5
2009	11
2010	11
2011	6
2012	4
2013	2
2014	8
2015	11
2016	12
2017	6
2018	9
2019	6
2020	1
2021	3
2022	2
2023	4
2024	3
2025	2
2026	1

By phase

A phase 1/2 study counts in both.

Early Phase 1: 2
Phase 1: 34
Phase 2: 9
Phase 3: 22
Phase 4: 42
No phase: 34

What it is tested for

Each study’s main condition, where its own words name it, so a study counts once.

Atrial Fibrillation: 20
Venous Thrombosis: 10
Pulmonary Embolism: 6
Liver Cirrhosis: 6
Venous Thromboembolism: 3
Heart Failure: 3
Obesity: 2
Aortic Valve Stenosis: 2
Neoplasms: 2
Hypertension: 2
Cardiovascular Diseases: 2
Diabetes Mellitus, Type 2: 2

Who runs them

Industry 33 · Other 109

AstraZeneca (5) · Boehringer Ingelheim (4) · Hadassah Medical Organization (3) · Hamilton Health Sciences Corporation (3) · Institute for Clinical and Experimental Medicine (3) · Novo Nordisk A/S (2) · Eli Lilly and Company (2) · University of California, San Francisco (2)

Often tested with

Tested in the same studies.

Rivaroxaban (17) · Apixaban (11) · Aspirin (10) · Midazolam (8) · Dabigatran (7) · Edoxaban (6) · Omeprazole (6) · Caffeine (5)

Coming up

From the study records. Dates are the sponsors’ own estimates and often move.

Tested against it · 5 phase 3 studies under way

Warfarin is the comparator. A study of two new drugs counts under both.

3Rivaroxaban · Second Affiliated Hospital, School of Medicine, Zhejiang University, Rawalpindi Institute of Cardiology · next primary completion Apr 2027
2Apixaban · Columbia University, University of Arizona · next primary completion Jul 2028

Reaching primary completion within a year · 3

Studies that test Warfarin.

Dec 2026Drug-drug Interaction Study of ZT002 Injection in Overweight and Obese ParticipantsPhase 1 · Beijing QL Biopharmaceutical Co.,Ltd
Dec 2026Evaluating the Pharmacokinetics of Oregano and Potential Oregano-drug Interactions Using a Drug Cocktail ApproachEarly Phase 1 · Washington State University
Jan 2027The Danish Warfarin-Dialysis Study - Safety and Efficacy of Warfarin in Patients With Atrial Fibrillation on DialysisPhase 4 · Nicholas Carlson

Studies

Open first, then newest update. How each study uses Warfarin is read from its arms, and is right about nine times in ten. Ask us to read each study. These are the studies that list it as an intervention; a search of ClinicalTrials.gov also finds studies that mention it only in a description, such as earlier treatment.

Testing it · 142

See all 142 studies that test Warfarin →

Given beside what is tested · 68 — Warfarin is usual care or a partner of the new treatment

Showing 20 of 68.

As the comparator · 100 — what is tested is compared with Warfarin

Showing 20 of 100.

Codes

What other systems call Warfarin · ClinicalTrials.gg INT008420

MeSH (NLM) D014859WarfarinConfirmed ClinicalTrials.gov, NLM, Wikidata
UNII (FDA) 5Q7ZVV76EIWARFARINConfirmed FDA, NLM, Wikidata
RxNorm 11289Confirmed FDA, Wikidata
Wikidata Q113368879rac-warfarinConfirmed FDA, NLM, Wikidata
Wikidata Q407431(RS)-warfarinConfirmed FDA, NLM, Wikidata
NCI Thesaurus C945WarfarinOne source FDA
DrugBank DB00682One source Wikidata

System	Code	Name there	Checked by
MeSH (NLM)	D014859	Warfarin	Confirmed ClinicalTrials.gov, NLM, Wikidata
UNII (FDA)	5Q7ZVV76EI	WARFARIN	Confirmed FDA, NLM, Wikidata
RxNorm	11289	—	Confirmed FDA, Wikidata
Wikidata	Q113368879	rac-warfarin	Confirmed FDA, NLM, Wikidata
Wikidata	Q407431	(RS)-warfarin	Confirmed FDA, NLM, Wikidata
NCI Thesaurus	C945	Warfarin	One source FDA
DrugBank	DB00682	—	One source Wikidata

Also registered as warfarin potassium (UNII I47IU4FOCO · RxNorm 82118) and warfarin sodium (UNII 6153CWM0CL · RxNorm 114194).

“Confirmed” means two independent publishers link the code to this drug; “one source”, one does and its name agrees.