Some of the antiepileptic drugs have been known to have mood calming properties.  Some subjects have found that when they take certain antiepileptic drugs they feel more alert, better able to think clearly, and less irritable. In addition, some subjects that may have symptoms of depression can at times notice an improvement in these symptoms after taking these medications. The purpose of this research study is to determine if this study medication may have these same positive results as some of the other antiepileptic drugs have produced. The duration of study participation is 12-20 weeks. There will be a total of two visits.

You may be eligible if you:

• Are an adult the ages of 18-75
  or a child between the ages of 11-17
• Diagnosed with partial epilepsy or primary generalized epilepsy or secondary generalized epilepsy
• Cannot have taken an antidepressant (such as paxil, prozac, zoloft) or drugs which affect thinking and/or mood (such as thorazine, haldol) in the past three months
• Must not have a serious medical condition, including a past history of kidney stones

This is a partial list of eligibility requirements.