Glycerol Phenylbutyrate
Various Alimentary Tract and Metabolism Products
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- Drug class
- Various Alimentary Tract and Metabolism Products
- Availability
- Prescription only
- Routes
- Oral
- Markets covered
- 4
- Products on record
- 4
- FDA reports (12 mo)
- 27
Overview
Glycerol Phenylbutyrate is an active pharmaceutical ingredient in the Various Alimentary Tract and Metabolism Products group (A16AX). The information below is compiled per regulator from the product labels on record, with direct links to the original documents.
Regulatory status by market
| Market | Regulator | Products | Last revision |
|---|---|---|---|
| US United States | FDA | 1 | April 9, 2026 |
| EU European Union | EMA | 1 | December 5, 2025 |
| CA Canada | Health Canada | 1 | March 22, 2025 |
| GB United Kingdom | MHRA | 1 | February 20, 2026 |
USUnited States· FDA
1 product
Uses
1 INDICATIONS AND USAGE Glycerol phenylbutyrate oral liquid is indicated for use as a nitrogen-binding agent for chronic management of patients with urea cycle disorders (UCDs) who cannot be managed by dietary protein restriction and/or amino acid supplementation alone.
, essential amino acids, arginine, citrulline, protein-free calorie supplements).
Limitations of Use:
Glycerol phenylbutyrate oral liquid is not indicated for the treatment of acute hyperammonemia in patients with UCDs because more rapidly acting interventions are essential to reduce plasma ammonia levels. The safety and efficacy of glycerol phenylbutyrate oral liquid for the treatment of N -acetylglutamate synthase (NAGS) deficiency has not been established.
Glycerol phenylbutyrate is a nitrogen-binding agent indicated for chronic management of patients with urea cycle disorders (UCDs) who cannot be managed by dietary protein restriction and/or amino acid supplementation alone. Glycerol phenylbutyrate oral liquid must be used with dietary protein restriction and, in some cases, dietary supplements.
EUEuropean Union· EMA
1 product
Uses
RAVICTI is indicated for use as adjunctive therapy for chronic management of patients with urea cycle disorders (UCDs) including deficiencies of carbamoyl phosphate synthetase I (CPS), ornithine carbamoyltransferase (OTC), argininosuccinate synthetase (ASS), argininosuccinate lyase (ASL), arginase I (ARG) and ornithine translocase deficiency hyperornithinaemia-hyperammonaemia homocitrullinuria syndrome (HHH) who cannot be managed by dietary protein restriction and/or amino acid supplementation alone.
, essential amino acids, arginine, citrulline, protein-free calorie supplements).
How to take
CACanada· Health Canada
1 product
Uses
1 Pediatrics 11/2022
How to take
GBUnited Kingdom· MHRA
1 product
1 product on record with this regulator. Detailed label text (uses, dosage, side effects) is being ingested — the original document is linked under Sources [4].
Drug interactions
Known interactions involving Glycerol Phenylbutyrate. Select one for details. This list is informational and not a complete interaction checker.
Interaction data compiled from DDInter (academic, CC-BY). Severity classification only - this is not a complete interaction checker and not medical advice.
Sources & citations
- [1]FDA DailyMed · 11981aec-dbf1-49… · revised April 9, 2026 [PDF]
- [2]European Medicines Agency · EMEA/H/C/003822 · revised December 5, 2025
- [3]Health Canada (DPD) · 02453304 · revised March 22, 2025
- [4]MHRA (UK) · PLGB534870001 · revised February 20, 2026
- [5]OpenFDA adverse-event reports (US), 12 months ending June 4, 2026.
Information on this page is compiled from public regulatory records. Drugvu is not affiliated with any regulator or pharmaceutical manufacturer. This is not medical advice. Always consult a qualified healthcare professional.