In October 2019, a class-action lawsuit
was filed against Sanofi-Aventis U.S., Sanofi US Services, Chattem, Inc., and Boehringer Ingelheim Pharmaceuticals for allegedly failing to disclose that the over-the-counter heartburn medication Zantac exposes users to unsafe levels of the carcinogen N-Nitrosodimethylamine (NDMA). (Dimesky et al v. Sanofi-Aventis U.S., LLC, Sanofi US Services Inc., Chattem, Inc., and Boehringer Ingelheim Pharmaceuticals, Inc.
, Case No. 19-cv-1517, D. CT.)