The purpose of this research is to determine whether the memory impairment and manic symptoms (feelings of agitation, overexcitement or hyperactivity) typically seen in those on corticosteroid therapy is decreased with a seizure medication called levetiracetam compared to placebo (an inactive substance). Since increased levels of cortisol (the body's natural corticosteroid) in the body are frequently associated with memory impairment interventions that may prevent or reverse this are of great importance.

It is hypothesized that patients who are scheduled to receive prescription corticosteroid therapy who are given levetiracetam pretreatment will show lesser memory impairment and manic symptoms than those receiving placebo.

Inclusion Criteria:

• Age 18-65 years
• Scheduled to receive a corticosteroid "burst" of at least 10 mg of prednisone equivalents and for at least 5 days duration
• English- or Spanish-speaking

Exclusion Criteria:

• History of allergic reaction or other contraindication to levetiracetam therapy
• Other unstable medical conditions (e.g. recent myocardial infarction, renal failure, diabetes with poor glycemic control)
• Pregnant or nursing women
• History of mental retardation, dementia or other severe cognitive disorders