KEY POINTS
  • Pfizer reported fourth-quarter earnings and revenue that beat estimates.
  • The pharma giant's guidance for 2019 disappointed investors.

Pharmaceutical giant Pfizer braced investors for little-to-no revenue growth in 2019 after its blockbuster erectile dysfunction drug Viagra, among others, lost patent protection and pain killer Lyrica faces similar competition from generic drugmakers this year.

Shares of Pfizer fell 2.7 percent in premarket trading Tuesday even after the drugmaker announced fourth-quarter earnings that exceeded Wall Street predictions. However, the stock was up more than 1 percent by midmorning trading amid the post-earnings conference call.