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Glycerol Phenylbutyrate Oral Liquid

Brand names: Ravicti

Category: Inborn Errors

Not specified 2

FDA status: To Be Discontinued · Last FDA update: Sep 1, 2026 · First posted: Sep 1, 2026 · 1 manufacturers, 2 listed presentations

As of Sep 1, 2026, the FDA lists Glycerol Phenylbutyrate Oral Liquid as being discontinued. Of 2 manufacturer presentations, 2 Not specified.

Ask your pharmacist: which of the 1 manufacturers below can they order right now, and whether a different strength or form of Glycerol Phenylbutyrate Oral Liquid is available. For alternatives, talk to your prescriber — see what to do if your medication is in shortage.
Presentation & package NDCManufacturerAvailabilityFDA note
RAVICTI, Oral Liquid, 1.1 g/1 mL (NDC 75987-050-07)
NDC 75987-050-07		 Amgen Inc. Not specified Discontinuation in the manufacturing of the drug product
RAVICTI, Oral Liquid, 1.1 g/1 mL (NDC 75987-050-06)
NDC 75987-050-06		 Amgen Inc. Not specified Discontinuation in the manufacturing of the drug product

Change log

No changes recorded yet.
Tracking began Oct 1, 2026. We check the FDA every 6 hours; any real change - a manufacturer moving from Limited to Available, a new recovery date, a new listing - shows up here with its date.

Cite this: “FDA drug-shortage status for Glycerol Phenylbutyrate Oral Liquid (FDA data as of Sep 1, 2026). Shortage Watch, openFDA.”

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FDA data last synced Oct 1, 2026 (FDA record dated Sep 30, 2026).