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New antiepileptic drugs.

For many years, the medical treatment of epilepsy was based on the use of the same few drugs, which were chosen according to the seizure type in a fairly standardized manner. In the recent past, there have been several changes, and more are expected in the near future. Since 1993, three new antiepileptic drugs have been released in the United States, and two more are expected to be released before the end of 1997. Because the full spectrum of efficacy and side effects of these drugs has not yet been established, the present management of epilepsy requires a larger degree of flexibility, and it is necessary to become acquainted with the new drugs and to follow closely new reports on the experience with new drugs. This is particularly true for the management of epilepsy in children, because controlled studies in children tend to be completed later than those in adults and antiepileptic drug use in children is often "off label." The present review of newer antiepileptic drug consists of a brief summary of background information on each drug, followed by a closer analysis of recently published papers. Information on pediatric use is reviewed, when available. The new antiepileptic drugs selected for discussion are gabapentin, lamotrigine, felbamate, vigabatrin, and topiramate.