glycerol phenylbutyrate

This medicine is authorised for use in the European Union.


Ravicti is a medicine used to manage urea cycle disorders in adults and children, when the diseases cannot be managed by changes in diet alone. Patients with urea cycle disorders are not able to get rid of waste nitrogen from the body because they lack some liver enzymes. In the body, waste nitrogen is turned into ammonia, which is harmful when it accumulates. Ravicti is used in patients who lack one or more of the following enzymes: carbamoyl phosphate synthase-I, ornithine carbamoyltransferase, argininosuccinate synthetase, argininosuccinate lyase, arginase I and ornithine translocase.

Ravicti contains the active substance glycerol phenylbutyrate.

Urea cycle disorders are rare, and Ravicti was designated an ‘orphan medicine’ (a medicine used in rare diseases) for several forms of the disease on 10 June 2010. Further information on the orphan designations can be found on the European Medicines Agency’s website.

This EPAR was last updated on 20/10/2022

Authorisation details

Product details
Agency product number
Active substance
glycerol phenylbutyrate
International non-proprietary name (INN) or common name
glycerol phenylbutyrate
Therapeutic area (MeSH)
Urea Cycle Disorders, Inborn
Anatomical therapeutic chemical (ATC) code

This medicine was designated an orphan medicine. This means that it was developed for use against a rare, life-threatening or chronically debilitating condition or, for economic reasons, it would be unlikely to have been developed without incentives. For more information, see Orphan designation.

Publication details
Marketing-authorisation holder
Immedica Pharma AB
Date of issue of marketing authorisation valid throughout the European Union
Contact address

Solnavagen 3H
113 63 Stockholm

Product information

19/10/2022 Ravicti - EMEA/H/C/003822 - IAIN/0043

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Product information documents contain:

You can find product information documents for centrally authorised human medicines on this website. For centrally authorised veterinary medicines authorised or updated from February 2022, see the Veterinary Medicines Information website.

Pharmacotherapeutic group

Other alimentary tract and metabolism products

Therapeutic indication

Ravicti is indicated for use as adjunctive therapy for chronic management of patients with urea cycle disorders (UCDs) including deficiencies of carbamoyl phosphate-synthase-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.

Ravicti must be used with dietary protein restriction and, in some cases, dietary supplements (e.g., essential amino acids, arginine, citrulline, protein-free calorie supplements).

Assessment history

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