VIII. Risks and Benefit There is no benefit to participating in this study. In the pivotal trials 15 % receiving Levetiracetam discontinued the study compared to 11.6% receiving placebo. Levetiracetam has reported only non-serious, reversible side effects. The most common significant side effect of levetiracetam is somnolence (i.e., lethargy), asthenia, infection, dizziness, and unsteady gait. Less common side effects include thinking abnormalities, memory problems, anxiety, depression, agitation, vertigo, and paresthesias. Rarely, levetiracetam has been associated with psychotic disturbance that resolved after treatment was discontinued (0.7%). The adverse event profile of levetiracetam is generally less than that to other medications such as lamotrigine, topiramate, phenytoin, carbamazepine, and bactrim. All study medication should be discontinued at the first sign of hallucinations.