Symptoms of valproic acid toxicity can be mild to severe and may include:
Central nervous system depression, including lethargy and coma Gastrointestinal symptoms such as nausea, vomiting, and abdominal pain Hepatotoxicity, which is liver damage that can lead to liver failure Hyperammonemia, an increase in ammonia levels in the blood, leading to encephalopathy Metabolic disturbances like metabolic acidosis and hypoglycemia
