J&J files new Concerta lawsuit against Impax Labs Friday, May 06, 2011 5:43 PM [AP] - Impax Laboratories Inc. said Friday it received a second patent lawsuit from Johnson & Johnson's Alza Corp. division related to Impax's proposed generic version of drug Concerta, which treats the attention deficit hyperactivity disorder. View Original Article http://us.rd.yahoo.com/finance/news/rss/story/*http://biz.yahoo.com/ap/110506/us_impax_labs_concerta_lawsuit.html?.v=1