Merck Faces Multiple Challenges: Will It Steer Through Successfully?

Key Takeaways MRK faces major headwinds as Keytruda, its top seller, nears the loss of exclusivity in 2028. Gardasil sales dropped 40% in Q1 2025 due to weak China demand, despite strength in other regions. MRK expects IRA's Medicare drug pricing to impact Januvia in 2026 and Keytruda starting in 2028.Merck (MRK) is expected to face several hurdles over the next few years that could affect its long-term growth trajectory, starting with the anticipated loss of exclusivity of its blockbuster PD-L1 inhibitor ...