Divalproex sodium comes in different pill forms that are for different uses.

Divalproex sodium tablets and capsules are used to treat seizures in people with epilepsy who are at least 10 years old. Divalproex sodium tablets are sometimes used together with other seizure medications.

Divalproex sodium tablets are also used in adults to prevent migraine headaches, or to treat manic episodes related to bipolar disorder (manic depression).

Divalproex sodium may also be used for purposes not listed in this medication guide.

You should not use divalproex sodium if you are allergic to it, or if you have:

• liver disease;
• a urea cycle disorder; or
• a genetic mitochondrial (MYE-toe-KON-dree-al) disorder such as Alpers' disease or Alpers-Huttenlocher syndrome, especially in a child younger than 2 years old.

Divalproex sodium can cause liver failure that may be fatal, especially in children under age 2 and in people with liver problems caused by a genetic mitochondrial disorder.

Tell your doctor if you have ever had:

• liver problems caused by a genetic mitochondrial disorder;
• depression, mental illness, or suicidal thoughts or actions; or
• a family history of a urea cycle disorder or infant deaths with unknown cause.

Some people have thoughts about suicide while taking divalproex sodium. Your doctor will need to check your progress at regular visits. Your family or other caregivers should also be alert to changes in your mood or symptoms.

Using divalproex sodium during pregnancy may increase the risk of serious birth defects that can develop early in pregnancy, even before you know you are pregnant. Using this medicine during pregnancy can also affect cognitive ability (reasoning, intelligence, problem-solving) later in your child's life. However, having a seizure during pregnancy could harm both the mother and the baby.

If you take divalproex sodium for seizures or manic episodes: The benefit of preventing seizures or manic episodes may outweigh any risks posed by this medicine. There may be other medications that are safer to use during pregnancy. Do not start or stop taking divalproex sodium without your doctor's advice.

Do not use divalproex sodium to prevent migraine headaches if you are pregnant or you could become pregnant.

If you are not pregnant, use effective birth control to prevent pregnancy while using divalproex sodium. Tell your doctor if you start or stop using hormonal contraception that contains estrogen (birth control pills, injections, implants, skin patches, and vaginal rings). Estrogen can interact with divalproex sodium and make it less effective in preventing seizures.

It may not be safe to breastfeed while using this medicine. Ask your doctor about any risk.

Use Divalproex Sodium (Oral) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.

Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning eyes, skin pain, red or purple skin rash with blistering and peeling).

Seek medical treatment if you have a serious drug reaction that can affect many parts of your body. Symptoms may include: skin rash, fever, swollen glands, muscle aches, severe weakness, unusual bruising, or yellowing of your skin or eyes.

Call your doctor at once if the person taking this medicine has signs of liver or pancreas problems, such as: loss of appetite, upper stomach pain (that may spread to your back), ongoing nausea or vomiting, dark urine, swelling in the face, or jaundice (yellowing of the skin or eyes).

Report any new or worsening symptoms to your doctor, such as: mood or behavior changes, depression, anxiety, panic attacks, trouble sleeping, or if you feel impulsive, irritable, agitated, hostile, aggressive, restless, hyperactive (mentally or physically), or have thoughts about suicide or hurting yourself.

Call your doctor at once if you have any of these other side effects:

• easy bruising, unusual bleeding (nose, mouth, or gums), purple or red pinpoint spots under your skin;
• fever, swollen glands, mouth sores;
• confusion, tiredness, cold feeling, vomiting, change in your mental state;
• severe drowsiness; or
• worsening seizures.

Common side effects may include:

• nausea, vomiting, stomach pain, diarrhea, constipation;
• headache, back pain;
• dizziness, drowsiness, weakness, tremors;
• memory problems, mood changes, trouble sleeping;
• bruising or bleeding;
• runny nose, sore throat, cough, wheezing, trouble breathing;
• fever, flu symptoms;
• problems with walking or coordination;
• swelling in your hands or feet;
• blurred vision, double vision, unusual eye movements;
• ringing in your ears;
• rash, hair loss; or
• changes in weight or appetite.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Drinking alcohol may increase certain side effects of divalproex sodium.

Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.