Issued to MSD MERCK CO. Application is approved as submitted.
Posted by FDA
October 1, 2026Application
NDA 505b1 • 210806
Product
PIFELTRO
Company
MSD MERCK CO
Stage
Final Decision
Assyro regulatory brief
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FDA posted an approval letter for PIFELTRO on 2026-10-01. This is the document posting date; consult the signed letter for the decision date. The source metadata identifies NDA 210806 as a supplement. Review the exact FDA letter for the approved conditions and labeling.
Review the exact FDA letter for approved conditions, labeling, and postmarketing requirements.
Open the document workspaceFDA source document
This letter documents an FDA approval action: FDA approved NDA 210806 for PIFELTRO, sponsored by MSD MERCK CO,. Product may be marketed. Verify current status and labeling in the source letter, since later FDA actions can change them.
NDA 210806 is the application under which FDA issued this approval letter for PIFELTRO to MSD MERCK CO. FDA posted the letter on October 1, 2026; the posting date is not the decision date.
The sponsor may market the product in line with the approved labeling. Approval letters typically set post-approval obligations: submitting final content of labeling, meeting any postmarketing requirements or commitments listed in the letter, updating Orange Book patent information within 30 days for NDAs, and ongoing annual reporting under 21 CFR 314.81.