Perrigo Co. has acquired JB Laboratories for approximately $44 million in cash. JB Labs is a contract manufacturer of OTC and nutrition products for healthcare suppliers in the U.S. The acquisition is expected to add more than $70 million in annual sales.     Perrigo’s chairman and chief executive officer, Joseph C. Papa, stated, “The acquisition of JB Laboratories will further expand our high-quality manufacturing base and provide additional FDA-approved production capacity to he...