Scientists Find New Tricks For Old Drugs

Lipitor, a best-seller as a cholesterol treatment, is being tested as a remedy for the flu.

Mel Evans / AP

Most drugs have side effects, but sometimes they’re actually good news.

Researchers are now exploring whether some cheap and common drugs have side effects that could help people fight off the flu and other lung infections.

This idea has a passionate advocate: Dr. David Fedson. About 10 years ago, this infectious disease specialist had a disturbing thought. He was working in the vaccine industry in France, and he started to wonder what would happen if, all of a sudden, the world was gripped with a flu pandemic.