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FX-909

Phase 1

Advanced Urothelial Carcinoma | Small molecule | Oncology |Merck & Company, Inc.|Last Updated: Apr 20, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment120

FDA Designations

No designations recorded

Clinical trial landscape

FX-909 · 1 trial · 3 indications

Phase 1 1
NCT05929235A Study of FX-909 in Patients With Advanced Solid Malignancies, Including Advanced Urothelial CarcinomaAdvanced Urothelial Carcinoma
RECRUITING120 Analytics
PHASE1RECRUITING
A Study of FX-909 in Patients With Advanced Solid Malignancies, Including Advanced Urothelial Carcinoma
Advanced Urothelial CarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

To assess dose-limiting toxicities, the incidence and severity of adverse events and serious adverse events associated with FX-909 (Safety and Tolerability)
through study completion, an average of 3 years

Incidence of dose-limiting toxicities (DLTs); Incidence and severity of adverse events (AEs) and serious adverse events (SAEs)

Secondary Endpoints

To define the preliminary recommended phase 2 dose of FX-909, and/or maximum tolerated dose (MTD)
through study completion, an average of 3 years
To characterize the pharmacokinetic profile of FX-909 in patients with advanced solid malignancies
through study completion, an average of 3 years
To characterize the pharmacokinetic profile of FX 909 in patients with advanced solid malignancies
through study completion, an average of 3 years
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Dose EscalationEXPERIMENTAL3+3 design, 5 dose levels
Expansion ExpansionEXPERIMENTALPart B will proceed in a 2-stage design that will investigate 2 dose arms of FX-909 in Stage 1; with a single arm in Stage 2 envisioned.
FX-909 in Combination with PembrolizumabEXPERIMENTALPart 1A1 will be a dose-escalation study to investigate FX-909 in combination with Pembrolizumab.

Interventions

NameTypeDescription
FX-909DRUGFX-909 is an orally available new molecular entity that inhibits basal- and ligand-activated transcription by PPARG.
Pembrolizumab (KEYTRUDA ®)DRUGPembrolizumab is an immunotherapy checkpoint inhibitor.
KEYTRUDA ®( Pembrolizumab)DRUGKeytruda is an immunotherapy checkpoint inhibitor.
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites12

Part A/B Inclusion Criteria: 1. Able to understand and willing to sign an informed consent. 2. Age ≥ 18 years. 3. Eastern Cooperative Oncology Group (ECOG) performance status 0, 1, or 2. 4. An archival, paraffin-embedded, formalin-fixed, tumor sample (see Laboratory Manual for details) that in Part...

Countries:United States
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Frequently asked questions about FX-909

What is FX-909 used for in Advanced Urothelial Carcinoma?

FX-909 is an investigational small molecule being studied for the treatment of advanced urothelial carcinoma. It is currently in Phase 1 clinical development, with an ongoing trial evaluating its safety and efficacy in patients with advanced solid malignancies, including advanced urothelial carcinoma.

Who makes FX-909?

FX-909 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The company is conducting clinical trials to evaluate the drug's potential in oncology.

What phase is FX-909 in?

FX-909 is in Phase 1 clinical development. It is an investigational drug, not yet approved by regulatory authorities, and is being studied in an ongoing Phase 1 trial for advanced solid malignancies, including advanced urothelial carcinoma.

What clinical trials is FX-909 in?

FX-909 is being evaluated in a Phase 1 clinical trial with the identifier NCT05929235. This open-label study is recruiting 120 participants in the United States and is investigating the drug in patients with advanced solid malignancies, including advanced urothelial carcinoma.

Is FX-909 the same as any other drug?

FX-909 is a distinct investigational small molecule developed by Merck & Company, Inc. No alternative names for FX-909 have been disclosed in the available clinical trial information, and it is being studied under its current designation.