Is Merck Too Dependent on Keytruda?

Is Merck Too Dependent on Keytruda?

Source: 
Motley Fool
News Tags: 
snippet: 
  • Keytruda generates more than one-third of Merck's revenue.
  • But the blockbuster drug faces a loss in exclusivity later this decade.
  • Declining Keytruda sales could pose a big challenge for Merck.