SAN DIEGO, CA -- (MARKET WIRE) -- May 22, 2007 -- According to study results presented today at the 2007 American Psychiatric Association annual meeting, iloperidone, an investigational atypical antipsychotic, was shown to have a favorable akathisia profile. Akathisia -- a debilitating sensation of restlessness that manifests as an inability to sit still -- is a frequent side effect of antipsychotic medications. Iloperidone is being studied by Vanda Pharmaceuticals Inc. (NASDAQ: VNDA), a biopharmaceutical company working to advance the science of personalized medicine.