Accidental Depakote (Valproate) Ingestion: Symptoms and Emergency Response

Accidental ingestion of Depakote (divalproex sodium/valproic acid) requires immediate medical evaluation. Effects are dose- and age-dependent.

Mild Toxicity (Low Dose, Adult)

• Nausea, vomiting, diarrhea
• Drowsiness, dizziness, tremor
• Blurred vision, headache

Severe Toxicity (High Dose, Child, or Chronic Accumulation)

• CNS: Confusion, lethargy, coma, seizures (paradoxical), cerebral edema.
• Metabolic: Hyperammonemia (valproate inhibits urea cycle) → encephalopathy; metabolic acidosis; hypothermia.
• Hepatic: Acute liver failure (rare, idiosyncratic; higher risk <2 yr, polytherapy, metabolic disorders).
• Hematologic: Thrombocytopenia, bone marrow suppression.
• Cardiovascular: Hypotension, arrhythmias.
• Respiratory: Depression, apnea.

Emergency Management

1. Call poison control (1-800-222-1222) and EMS.
2. Do not induce vomiting.
3. Activated charcoal (if <1–2 hr, intact airway).
4. IV fluids, airway protection, hemodynamic support.
5. L-carnitine (100 mg/kg IV loading, then 50 mg/kg q8h) for hyperammonemia/hepatotoxicity.
6. Hemodialysis/hemoperfusion in severe overdose (valproate is dialyzable).
7. Monitor: ammonia, LFTs, CBC, coagulation, electrolytes, ABG, valproate level.

Pregnancy

High teratogenic risk (neural tube defects, neurodevelopmental delay). Fetal exposure requires high-risk OB follow-up.