# Issuance of Priority Review Voucher; Rare Pediatric Disease Product; LOARGYS (pegzilarginase-nbln)
**AGENCY:**
Food and Drug Administration, HHS.
**ACTION:**
Notice.
**SUMMARY:**
The Food and Drug Administration (FDA) is announcing the issuance of a priority review voucher to the sponsor of a rare pediatric disease product application. The Federal Food, Drug, and Cosmetic Act (FD&C Act) authorizes FDA to award priority review vouchers to sponsors of approved rare pediatric disease product applications that meet certain criteria. FDA is required to publish notice of the award of the priority review voucher. FDA has determined that LOARGYS (pegzilarginase-nbln), approved February 23, 2026, manufactured by Immedica Pharma AB, meets the criteria for a priority review voucher.
**FOR FURTHER INFORMATION CONTACT:**
Quyen Tran, Center for Drug Evaluation and Research, Food and Drug Administration, 10903 New Hampshire Ave., Bldg. 22, Room 5324, Silver Spring, MD 20993-0002, 301-796-2771, *[email protected].*
**SUPPLEMENTARY INFORMATION:**
FDA is announcing the issuance of a priority review voucher to the sponsor of an approved rare pediatric disease product application. Under section 529 of the FD&C Act (21 U.S.C. 360ff), FDA will award priority review vouchers to sponsors of approved rare pediatric disease product applications that meet certain criteria. FDA has determined LOARGYS (pegzilarginase-nbln), manufactured by Immedica Pharma AB, meets the criteria for a priority review voucher. LOARGYS (pegzilarginase-nbln) injection is indicated for the treatment of hyperargininemia in adult and pediatric patients 2 years of age and older with Arginase 1 Deficiency (ARG1-D), in conjunction with dietary protein restriction.
For further information about the Rare Pediatric Disease Priority Review Voucher Program and for a link to the full text of section 529 of the FD&C Act, go to *https://www.fda.gov/ForIndustry/DevelopingProductsforRareDiseasesConditions/RarePediatricDiseasePriorityVoucherProgram/default.htm.* For further information about LOARGYS (pegzilarginase-nbln), go to the “Drugs@FDA” website at *https://www.accessdata.fda.gov/scripts/cder/daf/.*
Grace R. Graham,
Deputy Commissioner for Policy, Legislation, and International Affairs.