Merck & Co. Inc.'s stunning success in first-line metastatic lung cancer trials of Keytruda at the American Society of Clinical Oncology (ASCO) annual meeting set a high efficacy bar with prescribers and left its PD-1/L1 inhibitor rivals Bristol-Myers Squibb Co. and Roche on the defense.
After presentations at the ASCO meeting, held June 1-5 in Chicago, Merck's Keytruda (pembrolizumab) emerged as the clear leader in...






