Valproic Acid (Depakote)
Generic Name: Valproic Acid, Divalproex Sodium
Brand Names: Depakote, Depakote ER, Depakene, Depacon
Drug Class: Broad-spectrum anti-seizure medication
Primary Uses: Focal seizures, generalized seizures, absence seizures, myoclonic seizures, Lennox-Gastaut syndrome
What is Valproic Acid?
Valproic acid (also called valproate or divalproex) is a broad-spectrum anti-seizure medication effective for many seizure types. It has been used for decades and remains one of the most versatile epilepsy medications. However, it requires careful monitoring due to potential serious side effects, particularly in young children and during pregnancy.
How It Works
Valproic acid works through multiple mechanisms in the brain. It increases GABA (a calming brain chemical), blocks sodium channels, and affects calcium channels. This multi-targeted approach makes it effective for both focal and generalized seizures.
Who Might Take This Medication?
Valproic acid is FDA-approved for:
- Focal (partial) seizures
- Generalized tonic-clonic seizures
- Absence seizures
- Myoclonic seizures
- Generalized seizures of Lennox-Gastaut syndrome
- Mixed seizure patterns
It is also commonly used for:
- Migraine prevention
- Mood stabilization in bipolar disorder
Valproic acid should be AVOIDED in pregnancy whenever possible. It carries the highest risk among anti-seizure medications for:
- Birth defects (spina bifida, heart defects, facial abnormalities)
- Developmental delays and learning problems in children exposed in the womb
- Lower IQ scores in exposed children
Women of childbearing age should discuss this with their doctor. Alternative medications are strongly preferred if pregnancy is possible.
Common Side Effects
Most side effects are dose-related and may improve with time or dose adjustment.
Common side effects:
- Nausea, stomach upset, vomiting (especially when starting)
- Drowsiness or sleepiness
- Weight gain
- Trembling hands (tremor)
- Thinning of hair (temporary)
- Changes in menstrual periods
Less common but important:
- Liver problems
- Inflammation of the pancreas
- Low platelet count (affecting blood clotting)
- Take with food or a snack
- Take at regular times each day
- Extended-release formulations (Depakote ER) may be better tolerated
- Nausea often improves after the first few weeks
Serious Side Effects
Contact your healthcare provider or go to the emergency room if you notice:
- Liver problems: Excessive drowsiness, abdominal pain, vomiting, dark urine, yellowing of skin or eyes (jaundice), unusual bleeding or bruising
- Pancreatitis: Severe abdominal pain, nausea, vomiting
- Bleeding problems: Easy bruising, nosebleeds, bleeding gums
- Severe allergic reaction: Rash, fever, swollen lymph nodes
- Changes in mental status: Confusion, lethargy, unusual behavior
Medication Interactions
If you are taking or starting lamotrigine with valproic acid, the lamotrigine dose needs special adjustment. Always inform your doctor about all medications you’re taking.
Monitoring
Your doctor may order regular blood tests:
- Valproic acid blood levels: To ensure therapeutic range and guide dosing
- Liver function tests: Before starting and periodically (especially first 6 months)
- Complete blood count: To monitor platelets and blood cells
Administration
Give this medicine:
- Exactly as prescribed
- Regularly at the same time each day
- With meals or a snack, particularly if it upsets your child’s stomach
- Do not crush or chew extended-release tablets (Depakote ER)
- Depakene syrup or Depakote sprinkles can be used for children who can’t swallow pills
Stopping This Medication
It is important that this medication is not stopped suddenly. Never stop valproic acid abruptly. This can cause withdrawal seizures or status epilepticus.
Work with your doctor to taper gradually if discontinuation is needed.
Frequently Asked Questions
How long does it take to work?
Blood levels reach steady state in 2-4 days, but optimal seizure control may take several weeks.
What if I miss a dose?
Take it as soon as you remember. If it’s close to the next dose, skip the missed dose and continue the regular schedule. Never double up doses. Call your doctor if multiple doses are missed.
Can I drink alcohol?
Alcohol should be avoided or used with caution. It can increase drowsiness and may affect liver function.
Will it affect my weight?
Yes, weight gain can occur with valproic acid. Healthy diet and exercise are important.
Does it affect mood?
Valproic acid is often used as a mood stabilizer and can improve mood in many people. However, rarely it can worsen mood or behavior.
What about birth control?
Valproic acid does not reduce the effectiveness of birth control pills. However, pregnancy must be avoided due to high risk of birth defects. Use reliable contraception and discuss pregnancy planning with your doctor.
How do I know if liver problems are developing?
Watch for excessive drowsiness, loss of appetite, vomiting, abdominal pain, yellowing of skin or eyes, easy bruising, or loss of seizure control. Report these immediately.
Why do I need so many blood tests?
Regular monitoring helps detect potential problems early and ensures the medication is at therapeutic levels. Blood tests are especially important in the first 6 months.
Difference between Depakote and Depakote ER?
Depakote ER is extended-release and taken once daily. Regular Depakote is usually taken twice daily. They are not interchangeable mg-for-mg - ER typically requires about 10-20% higher total daily dose.
Can children under 2 take this medication?
Yes, but with extreme caution and very close monitoring. Genetic testing for POLG mutations is strongly recommended before starting valproic acid in infants and young children under 2 years. Children with POLG mutations should not receive valproic acid due to high risk of severe liver failure.
All of the possible uses, cautions, side effects, or interactions of this drug are not covered in this handout. If you want more information about this medication, ask your child’s doctor, pharmacist, or nurse.
This information is for educational purposes only and does not replace medical advice. Always consult your healthcare provider about medications and treatment decisions.