Doctors thought that combining two newer drugs, Erbitux and Avastin, that more precisely attack cancer would help people with advanced colon cancer. Instead, it made the disease worse and made the patients more miserable, a study found.
"This will stand out as a warning," said Dr. Cornelis Punt, the study's leader. "You have to do the randomized studies to see what really happens." The study was published in Thursday's New England Journal of Medicine.