WELIREG is a prescription medicine used to treat adults with kidney cancer that has spread (advanced RCC) following treatment with a PD-1 or PD-L1 and VEGF cancer medicines. It is not known if WELIREG is safe and effective in children. PD-1 = programmed death receptor-1; PD-L1 = programmed death-ligand 1; VEGF = vascular endothelial growth factor.

How to fill your prescription for WELIREG. Merck is committed to helping make treatment available to those who need it. Please talk to your doctor about how you will be receiving WELIREG—through a specialty pharmacy, your doctor’s office, or a hospital pharmacy.

WELIREG™ (belzutifan): For adults with advanced kidney cancer (RCC) following PD-1 or PD-L1 and VEGF treatments WELIREG works differently by targeting HIF-2α, a key driver of tumor growth RCC = renal cell carcinoma; HIF-2α = hypoxia-inducible factor 2 alpha.

WELIREG is a prescription medicine used to treat adults with kidney cancer that has spread (advanced RCC) following treatment with a PD-1 or PD-L1 and VEGF cancer medicines. It is not known if WELIREG is safe and effective in children.

What is WELIREG? WELIREG is a prescription medicine used to treat adults with von Hippel-Lindau (VHL) disease who need treatment for a type of kidney cancer called renal cell carcinoma (RCC), tumors in the brain and spinal cord called central nervous system (CNS) hemangioblastomas, or a type of pancreatic cancer called pancreatic neuroendocrine ...

WELIREG is a prescription medicine used to treat adults with kidney cancer that has spread (advanced RCC) following treatment with a PD-1 or PD-L1 and VEGF cancer medicines. It is not known if WELIREG is safe and effective in children.

View clinical trial results with WELIREG™ (belzutifan). See how WELIREG was studied and what was the outcome. Explore clinical trials for both conditions here.

Filling a prescription for WELIREG. Merck is committed to helping make treatment available to those who need it. Learn about your options for getting your prescribed WELIREG medication. Discover your options

WELIREG is a prescription medicine used to treat adults with kidney cancer that has spread (advanced RCC) following treatment with a PD-1 or PD-L1 and VEGF cancer medicines. It is not known if WELIREG is safe and effective in children.

WELIREG is a prescription medicine used to treat adults with kidney cancer that has spread (advanced RCC) following treatment with a PD-1 or PD-L1 and VEGF cancer medicines. It is not known if WELIREG is safe and effective in children.