Sanofi's Genzyme Headquarters Stands in Cambridge, Massachusetts

Sanofi's Genzyme Headquarters Stands in Cambridge, Massachusetts

Michael Springer/Bloomberg

The U.S. Food and Drug Administration said Sanofi’s Genzyme unit didn’t submit evidence from “adequate and well-controlled studies” showing that the benefits of Lemtrada outweigh its side effects, the Paris-based company said in a statement today.