It’s definitely doing something that’s concerning,” one scientist said about reported side effects of the drug.

Merck & Co. Inc.’s reported positive results Tuesday for a new, easier-to-administer formulation of its blockbuster cancer ...

As Merck prepares for its blockbuster immunotherapy Keytruda to face generic competition, it’s investing in a new cancer drug ...

Positive study results for Winrevair could help the drugmaker achieve sales growth past top-seller Keytruda’s upcoming patent ...