Sodium valproate

Second-line option in status epilepticus: 40 mg/kg IV (max 3 g). Avoid in women who could become pregnant.

AntiepilepticReviewed October 2026
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Dose

IndicationDose
Status epilepticus40 mg/kg IV over 10 minutes (max 3 g)
Maintenance500 mg twice daily, increasing to 1–2 g/day

Cautions

  • Highly teratogenic: avoid in women and girls who could become pregnant unless no alternative.
  • Liver toxicity, pancreatitis, high ammonia.
  • Meropenem greatly reduces valproate levels.

Frequently asked questions

Why is valproate avoided in young women?

It causes birth defects and developmental problems in babies exposed in pregnancy.

Used in these guides

Sources

  1. Drugs.com: Valproic acid dosage

Doses on this page are typical doses from the sources above. Always confirm with a current drug reference, the product leaflet and your hospital protocol, especially in children, pregnancy and kidney or liver disease.