 Walgreens Boots Alliance Inc NASDAQ:WBA shares shed nearly 5 in pre-market deals in New York on Thursday as the drugstore chain giant swung to a loss in its first quarter as the company took a US6.5 billion charge for opioid litigation. In the three months to end-November 2022, the company posted a loss per share of US4.31, compared to earnings per share EPS of US4.13 in the year-earlier quarter. 