CAMBRIDGE, Mass.--(BUSINESS WIRE)--May 16, 2005-- -- Company Will Host Live Webcast of Investor Event at the APA Meeting -- Alkermes (Nasdaq: ALKS) today announced that four abstracts related to clinical studies in the Vivitrex(R) (naltrexone long-acting injection) development program will be presented at the American Psychiatric Association (APA) Annual Meeting to be held in Atlanta, Georgia. The following poster presentations will take place on Monday, May 23, from 3:00 pm - 5:00 pm EDT: