The most commonly reported side effects of sodium phenylacetate include hyperammonaemia, off label use, and death, based on 114 FDA adverse event reports from 2005 to 2025. 11.4% of reports found the drug to be ineffective.
Percentages show how often each reaction appears relative to total reports for sodium phenylacetate.
These are voluntary reports and do not establish that sodium phenylacetate caused these reactions.
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Other drugs that appear in adverse event reports alongside sodium phenylacetate. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.
Also suspected
Taken alongside
Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.
42.1% of sodium phenylacetate adverse event reports involve female patients and 43.9% involve male patients. The largest age group is adult at 33%. These figures reflect who reports side effects, not underlying risk.
Sex
Age group
Conditions and purposes for which patients were taking sodium phenylacetate when the adverse event was reported.
Showing 15 of 20 indications
Sodium Phenylacetate is sold under the brand name Sodium Phenylacetate And Sodium Benzoate.
An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.
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