SAN DIEGO, May 30, 2012 (GLOBE NEWSWIRE) -- Zogenix Inc. (Nasdaq:ZGNX), a pharmaceutical company commercializing and developing products for the treatment of central nervous system disorders and pain, today announced that it has submitted an investigational new drug (IND) application to the U.S. Food & Drug Administration (FDA) for Relday™, which is a combination of Zogenix’s DosePro® needle-free, subcutaneous drug delivery system plus a proprietary, subcutaneous once-monthly formulation of risperidone for treating schizophrenia. In July 2011, Zogenix licensed from DURECT (Nasdaq:DRRX) exclusive global rights to develop and commercialize this proprietary formulation which utilizes DURECT’s SABER® depot technology. Initial clinical trials are currently planned to begin in the second half of the year, with results expected by year-end.