Pfizer is an over-100-year-old drug company going through a rough patch, which has happened before.

Pfizer (PFE +0.19%) stock reached all-time highs earlier this decade thanks to the company's dominance in the market for coronavirus vaccines and medicines. However, the pharmaceu ...

The pharmaceutical powerhouse still faces plenty of patent challenges, but it got a big one out of the way, securing time and money to work on other profit centers.