It is used for the Treatment of Epilepsy: Divalproex is commonly used to treat epilepsy, a neurological disorder characterized by recurrent seizures. In this case, the typical dosage is 500mg of Divalproex taken once or twice a day, depending on the individual patient's response to the medication. It is used for the Management of Bipolar Disorder: Divalproex may also be used to manage bipolar disorder, a psychiatric condition characterized by alternating episodes of mania and depression. In this case, the dosage may vary depending on the individual patient's response to the medication. It is used for the Prevention of Migraine Headaches: Divalproex is also used to prevent migraine headaches in adults. In this case, the typical dosage is 500mg of Divalproex taken once a day.