Mass tort litigation in 2026 groups many individual injury claims over a shared drug, device, chemical, or disaster for coordinated pretrial work. It affects drug users, children harmed online, and crash victims, turns on medical records and expert proof, and starts with saving records.
Dechert reports in its year-in-review analysis that pending multidistrict cases fell from 170 in January 2025 to 158 in January 2026. Product-liability cases make up about 40% of pending cases. New 2025 groups include Depo-Provera brain-tumor claims, GLP-1 vision-loss claims, Roblox child-safety claims, and Toronto airport crash claims.
Table of Contents
- How does a mass tort differ from a class action?
- Who is filing in 2026?
- What evidence carries weight?
- What happens next, and what should you save?
How does a mass tort differ from a class action?
Mass torts keep each person's case separate. Unlike a class action with one representative claim, each claimant must prove personal causation, injury, and damages. JAMS explains this requires medical records, exposure history, and expert support. Federal courts often manage these separate cases as multidistrict litigation, or MDL, meaning related federal cases move to one judge for shared pretrial work.
The U.S. District Court for the Southern District of New York explains in its MDL explainer that this setup handles common fact questions together. Under 28 U.S.C. §1407, the Judicial Panel on Multidistrict Litigation may move shared cases together when that step is convenient and efficient.
Who is filing in 2026?
Dechert's review identifies four new 2025 groups that show who files now. They include Depo-Provera users alleging brain tumors and GLP-1 drug users alleging vision loss. They also include families alleging children faced grooming through Roblox and victims of the 2025 Toronto airport crash.
The Judicial Panel on Multidistrict Litigation granted 21 of 32 centralization requests in 2025. Placement in a group does not create eligibility. Each person must still link personal use, exposure, diagnosis, and timing to the claimed harm.
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What evidence carries weight?
Winning requires personal proof, not group membership. Useful records show what product you used, when and how much, what symptoms followed, and what doctors found. Gaps in dates, dose, or diagnosis weaken causation.
Cornell Legal Information Institute publishes the text of Federal Rule of Evidence 702. The rule allows qualified opinion only when it helps the factfinder. It must rest on enough facts, reliable methods, and reliable use in the case. Judges use that test to admit or exclude medical and scientific testimony.
What happens next, and what should you save?
Centralization covers pretrial work only. The Federal Judicial Center lists bellwether trials, meaning test trials of representative cases, as a tool to gauge strength and settlement value. Cases that do not settle return to their home courts for trial.
Early records protect later options. The FDA provides its AEMS public dashboard for post-approval drug safety reports. Save medical records, track product use and dates, and check recalls and reports when weighing a claim.
- Keep doctor visits, prescriptions, pharmacy labels, and test results in one file.
- Write down product names, lot numbers, start and stop dates, and daily dose.
- Save photos of packaging, receipts, and side-effect notes with dates.
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