Sanofi-Aventis U.S. LLC

Lawsuit Filings

Qunol Liquid CoQ10 Supplements Falsely Advertised as Providing ‘Superior Absorption,’ Class Action Lawsuit Alleges

June 22, 2026 A class action lawsuit alleges that Qunol Liquid CoQ10 supplements do not provide superior absorption compared to other CoQ10 products.

Active Ingredient in Hundreds of Cold and Flu Meds Is ‘Entirely Ineffective,’ Class Action Says

September 13, 2023 A class action alleges fourteen companies make and/or sell over-the-counter cold and flu medicines with an active ingredient that is ineffective at treating nasal congestion.

Class Action Claims Maximum Strength Selsun Blue May Cause Scalp Irritation, Hair Loss [UPDATE]

February 5, 2021 A lawsuit claims the label of Maximum Strength Selsun Blue antidandruff shampoo fails to disclose the product can cause scalp irritation and hair loss.

Class Action Claims Sanofi Knew ‘For Years’ of Zantac NDMA Contamination

December 4, 2019 A class action claims Zantac manufacturer Sanofi knew the heartburn drug contained NDMA yet concealed this information from the public.

Class Action Claims Sanofi Knowingly Sold Zantac Contaminated with Probable Carcinogen

November 14, 2019 A proposed class action claims Sanofi knowingly manufactured and sold Zantac contaminated with the probable carcinogen N-Nitrosodimethylamine (NDMA).

Sanofi, Boehringer Ingelheim Hit with Class Action Over Allegedly Unsafe Levels of Probable Carcinogen in Zantac [DISMISSED]

September 17, 2019 Zantac makers Sanofi-Aventis U.S. and Boehringer Ingelheim face a class action over the allegedly high NDMA content in the over-the-counter heartburn and indigestion drug.