AstraZeneca named Tony Zook executive vice president for North America, succeeding David Brennan, who was named chief executive of the company in July.
 Zook is slated to assume his duties Jan. 1, 2006, as Brennan takes over the reigns from the retiring Sir Tom McKillop, whose leadership began following the 1999 merger of Astra AB and Zeneca.
Currently, Zook serves as AstraZeneca’s senior vice president, U.S. commercial operations.