Recent Updates
Recently added Catalysts

LY4066434

Phase 1

Pancreatic Ductal Adenocarcinoma | Small molecule | Oncology |Eli Lilly and Company|Last Updated: Jul 20, 2026

Target and mechanism

Molecular targetKRAS
Target classGene
ModalitySmall molecule

Also known as LY4066434.

Success Probability

Subscribe to view

Market & Valuation

Subscribe to view

Trial Design

CONTROLLED
Total Trials1
Total Enrollment750

FDA Designations

No designations recorded

Clinical trial landscape

LY4066434 · 1 trial · 5 indications

Phase 1 1
NCT06607185A Study of the Pan-KRAS Inhibitor LY4066434 in Participants With KRAS Mutant Solid TumorsPancreatic Ductal Adenocarcinoma
ACTIVE NOT_RECRUITING750 Analytics
PHASE1ACTIVE NOT_RECRUITING
A Study of the Pan-KRAS Inhibitor LY4066434 in Participants With KRAS Mutant Solid Tumors
Pancreatic Ductal AdenocarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with Dose-limiting Toxicities (DLTs)
During the first cycle of LY4066434 treatment (up to 28 days)
Number of Participants with One or More Treatment Emergent Adverse Events (TEAEs) and Serious Adverse Event(s) (SAEs) Considered by the Investigator to be Related to Study Drug Administration
Up to approximately 5 years

A summary of TEAEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the Reported Adverse Events module.

Secondary Endpoints

Overall Response Rate (ORR)
Up to approximately 5 years
Best Overall Response (BOR)
Up to approximately 5 years
Duration of Response (DOR)
Up to approximately 5 years
Unlock Study Endpoints

Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
LY4066434 Monotherapy Dose EscalationEXPERIMENTALEscalating doses of LY4066434 administered orally.
LY4066434 Dose OptimizationEXPERIMENTALLY4066434 administered orally either alone or with another investigational agent.

Interventions

NameTypeDescription
LY4066434.DRUGAdministered orally.
CetuximabDRUGAdministered intravenously.
Nab paclitaxelDRUGAdministered intravenously.
GemcitabineDRUGAdministered intravenously.
OxaliplatinDRUGAdministered intravenously.
LeucovorinDRUGAdministered intravenously.
IrinotecanDRUGAdministered intravenously.
5FluorouracilDRUGAdministered intravenously.
CarboplatinDRUGAdministered intravenously.
CisplatinDRUGAdministered intravenously.
PemetrexedDRUGAdministered intravenously.
PembrolizumabDRUGAdministered intravenously.
Unlock Study Design Details

Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites45

Inclusion Criteria: * Have evidence of KRAS G12C, G12D, G12V, G12A, G12S, or G13D mutation in tumor tissue or circulating tumor DNA * Histological or cytologically proven diagnosis of a locally advanced, unresectable, and/or metastatic solid tumor cancer * Have measurable disease per RECIST 1.1 * H...

Countries:United StatesBelgiumFranceGermanyItalyJapanSpainTaiwan
Unlock Eligibility Criteria

Recent Changes (Last 90 Days)

LOWJul 20, 2026NCT06607185lastUpdatePostDate: changed
LOWJul 20, 2026NCT06607185lastUpdatePostDate: changed
LOWMay 27, 2026NCT06607185lastUpdatePostDate: changed
LOWMay 27, 2026NCT06607185lastUpdatePostDate: changed

Frequently asked questions about LY4066434

What is LY4066434 used for?

LY4066434 is an investigational small molecule being developed for pancreatic ductal adenocarcinoma. It is also being studied in non-small cell lung cancer, colorectal cancer, and advanced or metastatic solid tumors. The drug is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

What does LY4066434 target?

LY4066434 targets KRAS, a gene that is frequently mutated in various cancers. As a pan-KRAS inhibitor, it is designed to act on multiple KRAS mutations. The drug is being evaluated in patients with KRAS mutant solid tumors, including pancreatic ductal adenocarcinoma.

Who makes LY4066434?

LY4066434 is being developed by Eli Lilly and Company, a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol LLY. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with KRAS mutant solid tumors.

What phase is LY4066434 in?

LY4066434 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by the FDA or other regulatory agencies. The ongoing Phase 1 trial is actively recruiting participants to assess the drug's safety, tolerability, and preliminary efficacy.

What clinical trials is LY4066434 in?

LY4066434 is being studied in a Phase 1 clinical trial with the identifier NCT06607185. This trial is titled 'A Study of the Pan-KRAS Inhibitor LY4066434 in Participants With KRAS Mutant Solid Tumors' and is enrolling approximately 750 participants across multiple countries, including the United States, Belgium, France, Germany, Italy, Japan, Spain, and Taiwan.

Is LY4066434 the same as other KRAS inhibitors?

LY4066434 is a distinct investigational drug developed by Eli Lilly. It is a pan-KRAS inhibitor, meaning it targets multiple KRAS mutations. While other KRAS inhibitors exist, LY4066434 is a unique compound being evaluated in its own clinical trial for KRAS mutant solid tumors.