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Asundexian

Phase 3

Prevention of Ischemic Stroke | Small molecule | Neurology |Bayer AG|Trials Updated: Nov 12, 2025

Asundexian target and mechanism

ModalitySmall molecule

Also known as Asundexian (BAY2433334)

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials2
Total Enrollment12,354

FDA Designations

No designations recorded

Asundexian clinical trials

Asundexian · 2 trials · 8 indications

Phase 3 1Phase 1 1
NCT05686070A Study to Test Asundexian for Preventing a Stroke Caused by a Clot in Participants After an Acute Ischemic Stroke or After a High-risk Transient Ischemic Attack, a So-called Mini StrokePrevention of Ischemic Stroke
COMPLETED12,327 Analytics
PHASE3COMPLETED
A Study to Test Asundexian for Preventing a Stroke Caused by a Clot in Participants After an Acute Ischemic Stroke or After a High-risk Transient Ischemic Attack, a So-called Mini Stroke
Prevention of Ischemic StrokeUnlock trial analytics

Study Endpoints

Primary Endpoints

Time to first occurrence of ischemic stroke
Up to 31 months
Time to first occurrence of ISTH major bleeding
Up to 31 months

ISTH=International Society on Thrombosis and Hemostasis

Area under the concentration vs. time curve from zero to infinity after single dose (AUC)*of BAY2433334
0 - 96 hours post dose

\*AUC(0-tlast) and AUC(0 tlast)/D will be used as main parameter, respectively, if mean AUC cannot be reliably determined in all participants. In case of dose adaptation for Child Pugh B patients, AUC/D\*will be evaluated instead of AUC.

Area under the concentration vs. time curve in plasma from zero to infinity (AUCu)* (unbound) after a single dose of BAY2433334.
0 - 96 hours post dose

\* AUC(0-tlast)u and AUC(0-tlast)u/D will be used as main parameter, respectively, if mean AUC cannot be reliably determined in all participants. In case of dose adaptation for Child Pugh B patients, AUCu/D\*, will be evaluated instead of AUCu.

Maximum observed drug concentration (Cmax) after single dose administration of BAY2433334.
0 - 96 hours post dose

In case of dose adaptation for Child Pugh B patients, Cmax/D will be evaluated instead of Cmax.

Maximum observed drug concentration (Cmax,u) (unbound) after a single dose of BAY2433334.
0 - 96 hours post dose

In case of dose adaptation for Child Pugh B patients, Cmax,u/D will be evaluated instead of Cmax,u.

Secondary Endpoints

Time to first occurrence of all strokes (ischemic and hemorrhagic)
Up to 31 months
Time to first occurrence of composite of CV death, MI or stroke
Up to 31 months
Time to first occurrence of composite of all-cause mortality, MI or stroke
Up to 31 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
AsundexianEXPERIMENTALParticipants will receive asundexian.
PlaceboPLACEBO_COMPARATORParticipants will receive placebo.
Arm A: Child-Pugh AEXPERIMENTALParticipants with mildly impaired hepatic function (Child-Pugh A)
Arm B: Child-Pugh BEXPERIMENTALParticipants with moderately impaired hepatic function (Child-Pugh B)
Arm C: Normal hepatic (Matched A and B)EXPERIMENTALParticipants with normal hepatic function matched to Arm A and B

Interventions

NameTypeDescription
Asundexian (BAY2433334)DRUGOnce daily, oral
PlaceboDRUGPlacebo to asundexian, once daily, oral
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites741

Inclusion Criteria: * Participants must be ≥ 18 years of age * Acute non-cardioembolic stroke or high-risk TIA * Systemic or cerebrovascular atherosclerosis or acute non-lacunar infarct Exclusion Criteria: * Ischemic stroke ≤ 7 days before the index event * Index stroke following procedures or st...

Countries:United StatesArgentinaAustraliaAustriaBelgiumBrazilBulgariaCanadaChinaColombiaCzechiaDenmarkFinlandFranceGermanyGreeceHungaryIndiaIsraelItalyJapanKazakhstanLatviaLithuaniaMalaysiaNetherlandsNorwayPolandPortugalSlovakiaSouth KoreaSpainSwedenSwitzerlandTaiwanTurkey (Türkiye)United Kingdom
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Frequently asked questions about Asundexian

What is asundexian used for?

Asundexian is being developed for the prevention of ischemic stroke and the prevention of thromboembolic events. Its clinical program includes patients after an acute non-cardioembolic ischemic stroke or a high-risk transient ischemic attack, also called a mini stroke, as well as conditions such as atrial fibrillation and acute myocardial infarction.

Who makes asundexian?

Asundexian is developed by Bayer AG, which trades on the OTC market under the ticker BAYRY. Bayer sponsors the clinical program for the drug, including the Phase 3 study in patients after an acute ischemic stroke or high-risk transient ischemic attack.

What phase is asundexian in?

Asundexian is in Phase 3 clinical development. It is investigational and has not been approved by the FDA. The Phase 3 program includes a completed trial in stroke prevention, and a completed Phase 1 study evaluated the drug in participants with mild or moderate reduction of liver function.

What clinical trials is asundexian in?

Asundexian has been studied in the Phase 3 trial NCT05686070, which enrolled 12,327 participants after an acute ischemic stroke or high-risk transient ischemic attack across many countries, and in the Phase 1 trial NCT05419635, which enrolled 27 participants with mild or moderate hepatic impairment in Germany.

Is asundexian the same as BAY2433334?

Yes. Asundexian is also known as BAY2433334, which is Bayer's internal compound designation for the same investigational drug. Searches for either name refer to the same small molecule being developed for prevention of ischemic stroke and thromboembolic events.

What is asundexian used for in stroke prevention?

Asundexian is being studied for preventing ischemic stroke caused by a clot in patients who have had an acute non-cardioembolic ischemic stroke or a high-risk transient ischemic attack. The completed Phase 3 trial NCT05686070 evaluated this use in 12,327 participants and was randomized, double-blind, and placebo-controlled.