singulair

Top-Selling Drugs About to Lose Patent Protection

The pharmaceutical industry is about to fall off a cliff -- a patent cliff. Over the next few years, some of the world's most popular and lucrative medicines will go off patent, and generic competition will siphon an estimated quarter of a trillion dollars from companies' bottom lines. Here's a rundown:

Merck experiences heart failure

Major drug companies are declining more than the general market today, but none like Merck & Co. (MRK). Merck's shares dropped 2.5 percent on...