Amgen Inc. topped Wall Street expectations for its fourth quarter, but the drug maker’s shares fell after hours as its 2023 guidance fell on the lower end of Wall Street’s expectations. Amgen AMGN said it earned $1.6 billion, or $3 a share, in the fourth quarter, compared with $1.89 billion, or $3.26 a share, in the year-ago period. Adjusted for one-time items, Amgen earned $4.40 a share. Revenue…