How Mass Tort Lawsuits Work: A Plain-English Guide

If you are considering filing a claim in a pharmaceutical mass tort — whether involving Depo-Provera, Ozempic and GLP-1 drugs, or another product — understanding how the legal process works can reduce anxiety and help you make informed decisions. Mass tort lawsuits are complex, but the core concepts are straightforward. This guide explains the process in plain English.

What Is a Mass Tort?

A mass tort is a type of litigation in which many individuals file separate lawsuits against the same defendant (or defendants) for injuries caused by the same product, drug, or action. Unlike a single personal injury case, a mass tort involves hundreds or thousands of plaintiffs — but each person’s case is treated individually.

The term “tort” simply means a civil wrong that causes harm. In pharmaceutical mass torts, the “wrong” is typically the manufacturer’s failure to adequately warn patients and doctors about known risks of a drug.

Mass Tort vs. Class Action: A Critical Difference

People often confuse mass torts with class actions. They are fundamentally different:

Class Action

• One or a few named plaintiffs represent the entire class
• All class members are bound by the outcome — if the case settles or goes to verdict, everyone gets the same result
• Individual differences (injury severity, damages, circumstances) are generally not considered
• Best suited for cases where injuries are uniform and damages are similar (e.g., overcharging for a product)

Mass Tort (MDL)

• Each plaintiff files their own individual case
• Cases are coordinated for efficiency but each person’s injuries and damages are evaluated separately
• Your compensation is based on your specific circumstances — the severity of your injury, the strength of your evidence, and the impact on your life
• Best suited for cases where injuries vary widely (e.g., pharmaceutical injuries ranging from mild to severe)

In pharmaceutical litigation, mass torts are far more common than class actions because injuries vary dramatically from person to person. A patient who required emergency surgery has a very different case from a patient who experienced moderate symptoms managed with medication.

How MDL Works: Step by Step

Most pharmaceutical mass torts are managed through a process called multidistrict litigation (MDL). Here is how it works:

Step 1: Cases Are Filed

When a pharmaceutical product causes widespread harm, individual lawsuits begin appearing in federal courts across the country. As the number of cases grows, the legal system recognizes the need for coordination.

Step 2: The JPML Consolidates Cases

The Judicial Panel on Multidistrict Litigation (JPML) — a special federal panel — determines whether the cases should be consolidated into a single court for pretrial proceedings. The JPML considers factors like the number of cases, commonality of issues, and convenience for the parties.

If consolidation is ordered, all federal cases are transferred to a single judge in a single district. For example, the GLP-1 litigation (MDL 3094) is consolidated in the Eastern District of Pennsylvania.

Step 3: Leadership Is Appointed

The MDL judge appoints plaintiffs’ leadership counsel — a team of experienced attorneys who coordinate the litigation on behalf of all plaintiffs. This team handles common tasks like discovery, expert witness development, and motion practice. Your individual attorney remains your representative, but the leadership team handles the shared work.

Step 4: Discovery

Discovery is the process of exchanging evidence between the parties. In a pharmaceutical MDL, this includes:

• Corporate documents — internal emails, research reports, meeting minutes, and regulatory submissions from the manufacturer
• Depositions — sworn testimony from company executives, scientists, and regulatory personnel
• Expert reports — opinions from medical, scientific, and economic experts retained by both sides
• Plaintiff fact sheets — standardized forms completed by each plaintiff detailing their drug use, diagnosis, treatment, and damages

Discovery often reveals critical evidence about what the manufacturer knew, when it knew it, and what it chose to do (or not do) in response.

Step 5: Daubert/Rule 702 Hearings

Before trial, the court holds hearings under Federal Rule of Evidence 702 to determine whether each side’s expert witnesses meet the standard for admissibility. The court evaluates whether the expert’s methodology is scientifically reliable and whether their opinions are relevant.

This is a crucial gate. If the plaintiffs’ causation experts survive the Rule 702 challenge, it means the court has found their opinion — that the drug caused the injury — to be based on reliable science. This often accelerates settlement discussions.

Step 6: Bellwether Trials

The MDL judge selects a small number of cases — typically 3-10 — to go to trial first. These bellwether trials serve as test cases:

• They allow both sides to see how juries respond to the evidence
• Plaintiff verdicts demonstrate the manufacturer’s exposure and create settlement pressure
• Defense verdicts may strengthen the manufacturer’s negotiating position
• The results inform both sides’ assessment of case value across the entire litigation

Bellwether cases are selected to represent a range of injury types and severity levels. The outcomes are not technically binding on other cases, but they have enormous practical influence.

Step 7: Settlement Negotiations

After bellwether trials, the parties often engage in global settlement negotiations. The manufacturer may propose a settlement program that offers compensation to all qualifying claimants based on a structured matrix — a grid that assigns case values based on factors like:

• Injury severity — more serious injuries receive higher compensation
• Strength of medical evidence — cases with objective diagnostic testing (like a gastric emptying study for gastroparesis) are valued higher
• Duration of drug use — longer exposure typically strengthens the causal connection
• Impact on life — lost wages, ongoing medical needs, and quality of life impairment

A court-appointed special master or settlement administrator typically oversees the claims process to ensure fairness and consistency.

Step 8: Resolution

Individual claimants receive settlement offers based on where their case falls in the matrix. You have the right to accept or reject the offer — you are not forced to settle. If you reject a settlement offer, your case can proceed to individual trial.

Timeline: How Long Does This Take?

Mass tort litigation is not fast. Here are realistic expectations:

• Filing to consolidation: 6-12 months
• Discovery phase: 1-2 years
• Bellwether trials: 2-4 years from filing
• Settlement negotiations: can begin during or after bellwether trials
• Individual claim resolution: varies, but most claimants see resolution within 3-5 years of filing

Patience is essential, but there is a reason for the pace: the thorough process builds the strongest possible case and typically results in better outcomes than rushing to settlement.

What You Should Expect as a Client

If you file a mass tort claim, here is what your experience will look like:

• Your attorney does most of the work. You will not need to appear in court during the pretrial phase. Your primary role is to provide information (medical records, prescription history, fact sheets) and respond to your attorney’s requests.
• Communication may be infrequent during the pretrial phase. There may be long stretches without updates as discovery and pretrial motions proceed. This is normal — the absence of news does not mean your case is stalled.
• You pay nothing upfront. Mass tort attorneys work on contingency. You pay no fees unless your case results in a recovery.
• Your case is individual. Even though your case is part of a larger litigation, your injuries and damages are evaluated on their own merits. Your outcome depends on your specific facts.
• You retain control. You can accept or reject any settlement offer. You are not bound by what other claimants choose.

Frequently Asked Questions

Can I still file if cases have already been consolidated into an MDL?

Yes. MDLs accept new cases on an ongoing basis. Filing later does not prevent you from participating, but filing earlier ensures your case has the most time for development.

Do I need to live in the state where the MDL is located?

No. The MDL consolidates cases from all over the country for pretrial purposes. Your case originates in your home jurisdiction and is transferred to the MDL court for pretrial efficiency. If the case does not settle, it can be remanded back to your home court.

What percentage does my attorney take?

Contingency fees in mass tort cases typically range from 33% to 40% of the recovery, depending on the complexity and stage at which the case resolves. Your fee arrangement will be spelled out in your retainer agreement.

What if I do not want to settle?

You are never forced to accept a settlement. If you reject a settlement offer, your case can proceed to individual trial. However, be aware that trials carry risk — there is no guarantee of a verdict in your favor.

How is a mass tort different from a product recall?

A product recall is a regulatory action by the FDA or the manufacturer to remove a product from the market. A mass tort is a legal action seeking compensation for injuries already caused. They can occur simultaneously, but a recall does not automatically mean compensation — you need to pursue a legal claim for that.

Take the Next Step

Understanding the mass tort process is the first step toward protecting your rights. Whether your claim involves Depo-Provera and meningioma or GLP-1 drugs and gastrointestinal injuries, the legal framework is designed to hold manufacturers accountable while respecting the individual nature of your experience.

If you or a loved one was harmed by a pharmaceutical product, request a free case review today.

Advertisement. This content is provided for informational purposes only and does not constitute legal advice. NuLegal | Ashkaan Hassan, Esq. | CA Bar #283629