HAYWARD, Calif.--(BUSINESS WIRE)--Impax Laboratories, Inc. (NASDAQ:IPXL) announced today that its first quarter 2009 earnings will be released before the market opens on Tuesday, May 5, 2009 and will be available on Impax’s Web site at www.impaxlabs.com. The Company will host an earnings conference call and live webcast with financial analysts at 11:00 a.m., Eastern time.