Marine Martin’s son was born in 2002 with birth defects and neurobehavioral disorders after her pregnancy exposure to valproate. She identified a possible connection in 2009 and founded the Association for Assistance and Information for Parents of Children Affected by Valproate (APESAC) in 2011. Martin pursued civil proceedings against Sanofi in 2012, criminal proceedings in 2015, and a claim against the French state in 2016, arguing that patients were not adequately warned about risks during pregnancy.
French health-agency studies estimated that valproate exposure was associated with about 4,000 children born with malformations and approximately 30,000 children with neurodevelopmental disorders since 1967. In February 2020, Sanofi was formally investigated in France for aggravated deception and endangering lives; involuntary-manslaughter allegations were added in August after four deceased-child cases entered the proceedings. The ANSM was also indicted in October 2020. On January 5, 2022, a French court held Sanofi responsible in APESAC’s first health-related class action for insufficient vigilance, inadequate information, and marketing a defective product. France created a dedicated compensation scheme in November 2016, while warning pictograms and European prescribing-monitoring changes followed in 2017–2018. The criminal investigation remained distinct from the civil ruling.