Epilepsy Properties and Seizure Suppression in a Severe Motor and Intellectual Disabilities

Purpose: In hospitalized patients with severe motor and intellectual disabilities (SMID), we analyzed the association of the SMID class to factors such as the prevalence of epilepsy, frequency of seizures and number of concomitantly used anti-epileptic drugs (AEDs), and evaluated the usefulness of addition of the new AEDs (gabapentin, topiramate, lamotrigine and levetiracetam) to the treatment regimen. Results: The prevalence of epilepsy in the study population was about 60%. There were 39.5% who were free of epileptic seizures during the 6-year survey period and remained well-controlled with medication. As the SMID increased in severity, the frequency of seizures increased, the number of concomitantly used AEDs increased, and the tendency towards addition of new AEDs became more marked. About the use situation of new AED and old AED, this comparison revealed a tendency towards addition of a new AED when the seizures were poorly controlled in response to concomitant use of multiple old AEDs. The frequency of seizures and the number of concomitantly used AEDs were higher in patients with SMID of high severity than in those with SMID of low severity. Analysis of the time-course of the frequency of seizures before and after the addition of new AEDs revealed a significant reduction in the frequency of seizures following the addition of the new AEDs (P > 0.001). Conclusions: These results suggest that the new AEDs are useful in the management of SMID-associated epilepsy, because of their effect of reducing the frequency of SMID-associated seizures and their high tolerability.