Wednesday, July 8, 2026

Drug profile · INN

belzutifan

belzutifan (WELIREG) is a endothelial pas domain-containing protein 1 inhibitor. Associated with Merck KGaA, Darmstadt, Germany. Route of administration: oral. Current US regulatory status: approved.

FDA: approved EMA: approved TGA: approved Antineoplastic and immunomodulating agents (L01) L01XX74
US status approved
Patents linked 0
Pipeline programs 11
News articles 2
Drug details — belzutifan

Quick answer

belzutifan (WELIREG) is a endothelial pas domain-containing protein 1 inhibitor. Associated with Merck KGaA, Darmstadt, Germany. Route of administration: oral. Current US regulatory status: approved.

Key facts

INN belzutifan
Brand WELIREG
Mechanism Endothelial PAS domain-containing protein 1 inhibitor
Target Endothelial PAS domain-containing protein 1
Therapeutic class Antineoplastic and immunomodulating agents (L01)
Route ORAL
Formulation TABLET
ATC code L01XX74

Mechanism of action

Endothelial PAS domain-containing protein 1 inhibitor

Primary target: Endothelial PAS domain-containing protein 1

Approval history

Authority Status Date
FDA approved
EMA approved
TGA approved

Recent coverage

Pipeline programs

  1. MK-6482-011 Phase 3 · MSD Merck Sharp · Advanced RCC with clear cell component
  2. MK-6482-033 Phase 3 · MSD Merck Sharp · Renal Cell Carcinoma
  3. MK-6482-034 Phase 3 · MSD Merck Sharp · Renal Cell Carcinoma
  4. MK-6482-043 Phase 3 · MSD Merck Sharp · Renal Cell Carcinoma, hepatocellular carcinoma, nonMSI-H/dMM
  5. Belzutifan Phase 2 · Merck KGaA, Darmstadt · Carcinoma, Renal Cell
  6. Belzutifan, PALBOCICLIB Phase 2 · MSD Merck Sharp · Advanced ccRCC
  7. MK-3475-03A Phase 2 · MSD Merck Sharp · Renal cell carcinoma
  8. MK-3475-03B Phase 2 · MSD Merck Sharp · Renal cell carcinoma

Related & competitor drugs

  1. abiraterone acetate Antineoplastic and immunomodulating agents (L02)
  2. anagrelide Antineoplastic and immunomodulating agents (L01)
  3. apremilast Antineoplastic and immunomodulating agents (L04)
  4. arsenic trioxide Antineoplastic and immunomodulating agents (L01)
  5. axitinib Antineoplastic and immunomodulating agents (L01)
  6. azacitidine Antineoplastic and immunomodulating agents (L01)

Frequently asked questions

What is belzutifan?

belzutifan (WELIREG) is a endothelial pas domain-containing protein 1 inhibitor. Associated with Merck KGaA, Darmstadt, Germany. Route of administration: oral. Current US regulatory status: approved.

What is the brand name for belzutifan?

WELIREG is a marketed brand name for belzutifan. Check FDA Drugs@FDA for the current US label holder and prescribing information.

What is the US approval status of belzutifan?

belzutifan has approved status in the United States according to our Drugs@FDA-derived records. Verify on the official FDA label before clinical or commercial decisions.