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fianlimab+cemiplimab

Phase 2

Head and Neck Squamous Cell Carcinoma (HNSCC) | Small molecule | Oncology |Regeneron Pharmaceuticals, Inc.|Last Updated: Aug 21, 2026

Target and mechanism

Molecular targetLAG3
Target classInhibitor
ModalitySmall molecule

Also known as Fianlimab, fianlimab

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment120

FDA Designations

No designations recorded

Clinical trial landscape

fianlimab+cemiplimab · 1 trial · 1 indication

Phase 2 1
NCT06769698A Study to See if Giving Fianlimab and Cemiplimab Together is Better Than Cemiplimab Alone at Treating Recurrent or Metastatic Head and Neck Squamous Cell CarcinomaHead and Neck Squamous Cell Carcinoma (HNSCC)
RECRUITING120 Analytics
PHASE2RECRUITING
A Study to See if Giving Fianlimab and Cemiplimab Together is Better Than Cemiplimab Alone at Treating Recurrent or Metastatic Head and Neck Squamous Cell Carcinoma
Head and Neck Squamous Cell Carcinoma (HNSCC)Unlock trial analytics

Study Endpoints

Primary Endpoints

Overall Response Rate (ORR)
Up to 90 days after last study treatment, approximately 58 months

Secondary Endpoints

Incidence of Adverse Events (AEs)
Up to 90 days after last study treatment, approximately 58 months
Severity of AEs
Up to 90 days after last study treatment, approximately 58 months
Incidence of Treatment Emergent Adverse Events (TEAEs)
Up to 90 days after last study treatment, approximately 58 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Cohort 1EXPERIMENTALApproximately 60 participants with HPV (human papillomavirus) positive HNSCC. Randomized 1:1 to Fianlimab + Cemiplmab Fixed Dose Combination (FDC) versus Cemiplimab + Placebo.
Cohort 2EXPERIMENTALApproximately 60 participants with HPV negative HNSCC. Randomization is the same as in Cohort 1.

Interventions

NameTypeDescription
FDC fianlimab+cemiplimabDRUGFixed-Dose Combination (FDC) Administered per the protocol
CemiplimabDRUGAdministered per the protocol
PlaceboDRUGAdministered per the protocol
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites35

Key Inclusion Criteria: 1. Have histologically confirmed (by local pathology) R/M HNSCC that is considered incurable by local therapies 2. Primary tumor location of oral cavity, oropharynx, larynx, or hypopharynx (patients with cervical neck node SCC with occult primary as described in the protocol...

Countries:United StatesAustraliaFranceItalySpain
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Recent Changes (Last 90 Days)

LOWAug 21, 2026NCT06769698lastUpdatePostDate: changed
LOWAug 21, 2026NCT06769698lastUpdatePostDate: changed
LOWAug 6, 2026NCT06769698lastUpdatePostDate: changed
LOWAug 6, 2026NCT06769698lastUpdatePostDate: changed
LOWJul 30, 2026NCT06769698lastUpdatePostDate: changed
LOWJul 30, 2026NCT06769698lastUpdatePostDate: changed
LOWJul 15, 2026NCT06769698lastUpdatePostDate: changed
LOWJul 15, 2026NCT06769698lastUpdatePostDate: changed
LOWJun 25, 2026NCT06769698lastUpdatePostDate: changed
LOWJun 25, 2026NCT06769698lastUpdatePostDate: changed
LOWJun 25, 2026NCT06769698lastUpdatePostDate: changed

Frequently asked questions about fianlimab+cemiplimab

What is Fianlimab used for?

Fianlimab is an investigational antibody being studied for the treatment of several cancers, including melanoma, advanced renal cell carcinoma, non-small cell lung cancer, and head and neck squamous cell carcinoma. It is being evaluated in clinical trials, often in combination with cemiplimab, for these oncology indications.

What does Fianlimab target?

Fianlimab is a monoclonal antibody, indicated by its -mab suffix, that is being studied as a cancer immunotherapy. It is designed to be used in combination with cemiplimab for the treatment of various solid tumors, including melanoma and advanced renal cell carcinoma.

Who is developing Fianlimab?

Fianlimab is being developed by Regeneron Pharmaceuticals, Inc., a biopharmaceutical company traded on the Nasdaq under the ticker symbol REGN. Regeneron is conducting clinical trials of fianlimab, often in combination with its other investigational or approved agents, for multiple oncology indications.

What phase is Fianlimab in?

Fianlimab is in Phase 2 and Phase 3 clinical trials. It is an investigational drug, meaning it has not been approved by regulatory authorities and is still undergoing clinical development to assess its safety and efficacy in treating various cancers.

What clinical trials is Fianlimab in?

Fianlimab is being studied in several clinical trials. One Phase 3 trial (NCT05352672) compares fianlimab plus cemiplimab versus pembrolizumab in previously untreated advanced melanoma. Another Phase 3 trial (NCT05608291) tests the combination for preventing melanoma recurrence after surgery. A Phase 2 trial (NCT07188896) is evaluating fianlimab and cemiplimab with or without ipilimumab in first-line advanced renal cell carcinoma.

Is Fianlimab the same as fianlimab plus cemiplimab?

Fianlimab is a single drug, while fianlimab plus cemiplimab is a combination regimen. In clinical trials, fianlimab is often studied in combination with cemiplimab, and this combination is sometimes referred to as fianlimab+cemiplimab. The two drugs are distinct agents that are being evaluated together for cancer treatment.