Over the course of the clinical trials, Pfizer said six of the 4,740 Exubera-treated patients versus one of the 4,292 patients not treated with Exubera developed lung cancer.

It updated the Exubera labeling to include a warning with safety information about lung cancer cases found in patients who used Exubera.

Pfizer said in October it would stop marketing Exubera, which was a commercial flop. The warning in the label stemmed from an ongoing review of data from the Exubera clinical trial program and post-marketing experience by Pfizer and the U.S. Food and Drug Administration, Pfizer said. (Reuters)