Legal · Mass Tort Glossary
Also known as: inadequate warning, failure to disclose, inadequate labeling
A products liability theory alleging that a manufacturer failed to adequately disclose known risks associated with a drug, device, or chemical product, leaving users unable to make informed decisions about exposure or use. In mass tort litigation, failure to warn is frequently pleaded alongside design defect claims and is central to cases involving pharmaceuticals, medical devices, and toxic substances where the defendant possessed risk data that was not communicated to prescribers, patients, or the public. From an advertising and intake perspective, campaign messaging often targets claimants who were never informed of a specific risk—such as a serious side effect or occupational hazard—making documented prescriber or employer communication records a key qualifier during lead screening.
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This glossary is compiled by Mass Tort Ad Agency from 15 years and $250M+ in plaintiff Meta ad spend. Browse the full reference or talk to our team.
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