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Cemiplimab, Fianlimab, Vidutolimod, Regn2810, Regn3767, Libtayo
Locally Advanced Basal Cell Carcinoma
Phase II
Not Yet Recruiting
A Study Comparing Cemiplimab-based Treatments for Adult Participants With Locally Advanced Basal Cell Skin Cancer (laBCC)
Sep 01, 2026
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Regn15505, Regn15505+Cemiplimab, Regn15505+Regn4336, Regn2810, Libtayo
Metastatic Castration-Resistant Prostate Cancer (Mcrpc), Clear Cell Renal Cell Carcinoma (Ccrcc)
Phase I/II
Recruiting
REGN15505 (PSMAx4-1BB) Alone or in Combination With Cemiplimab or REGN4336 (PSMAxCD3) in Adult Patients With Metastatic Castration-Resistant Prostate Cancer and Clear Cell Renal Cell Carcinoma
May 11, 2026
FAQ
What are the FDA phases for drug approval?
The FDA approval process for new drugs is divided into several phases:
a. Preclinical testing
b. Phase 1 – Safety and dosage
c. Phase 2 – Effectiveness and side effects
d. Phase 3 – Confirmation of effectiveness, monitoring of adverse reactions, and comparison with existing treatments
e. Phase 4 – Post-marketing studies to track long-term safety and effectiveness
a. Preclinical testing
b. Phase 1 – Safety and dosage
c. Phase 2 – Effectiveness and side effects
d. Phase 3 – Confirmation of effectiveness, monitoring of adverse reactions, and comparison with existing treatments
e. Phase 4 – Post-marketing studies to track long-term safety and effectiveness
What is a clinical trial?
A clinical trial is a carefully designed study in which researchers test a drug, treatment, or medical device in people to evaluate its safety, effectiveness, and potential side effects. These trials are essential for determining whether a new treatment should be approved for widespread use.
What drugs does Regeneron (REGN) have in its pipeline
REGN is currently developing the following drugs: Cemiplimab, Fianlimab, Vidutolimod, Regn2810, Regn3767, Libtayo, Olatorepatide, Regn-2Cat, Freneslerbart, Mevonlerbart, Regn1908, Regn1909. These drug candidates are in various stages of clinical development as the company works toward FDA approval.