Pipeline diversification faces Gardasil and Keytruda pressures
A comparative analysis describes Keytruda as Merck’s central oncology driver, alongside contributions from newer products and Animal Health. It reports weaker Gardasil sales, especially in key markets, and notes Merck’s acquisitions and planned launches intended to broaden its portfolio.
If newer launches, pipeline programs and Animal Health expand as described, they could reduce reliance on Keytruda over time. Continued Gardasil weakness, competitive pressure and the approaching Keytruda exclusivity loss could make that transition more difficult.

