HAYWARD, Calif., June 21, 2016 /PRNewswire/ — Impax Laboratories, Inc. (NASDAQ: IPXL), a specialty pharmaceutical company, today announced that it has signed definitive agreements with Teva Pharmaceutical Industries Ltd. (“Teva”) and affiliates of Allergan plc (“Allergan”) for the acquisition of a broad portfolio of generic products across solid oral, inhalable, …