Skip to content
Dupixent Lawsuit Lawyers
At NST Law, we are dedicated to helping injured individuals and their families get the justice and compensation they deserve.
BILLIONS
FOR CLIENTS
YEARS
EXPERIENCE
LAWYERS & STAFF
HELPING YOU
A cancer diagnosis can be emotionally and financially devastating. Knowing a trusted medication could be the culprit behind your turmoil can make it even more difficult.
The manufacturers of Dupixent, a drug used to treat eczema and other conditions, are currently facing lawsuits for allegedly failing to warn patients about an increased risk of Cutaneous T-Cell Lymphoma (CTCL) associated with its use.
If you believe you or a loved one may qualify for a Dupixent lawsuit, contact the experienced legal team at NST Law today for a free, confidential case review.
- What Is Dupixent (Dupilumab) and What Is it Used For?
- Why Are People Filing Dupixent Lawsuits?
- Why Choose NST Law for Your Dupixent Case?
- Who Can Qualify to File a Dupixent Lawsuit?
- Signs and Symptoms of T-Cell Lymphoma
- What Are the Statutes of Limitations and Discovery Rules for Dupixent Lawsuits?
- What Happens During a Dupixent Lawsuit?
- What Compensation Is Available in a Dupixent Lawsuit?
- How Do Lawyers Evaluate Dupixent Lawsuits?
- Frequently Asked Questions (FAQs)
- Call NST Law for a Free Consultation Today
What Is Dupixent (Dupilumab) and What Is it Used For?
Dupilumab, sold under the brand name Dupixent, is an injectable monoclonal antibody treatment. Dupixent is prescribed to treat a variety of different conditions, including atopic dermatitis, asthma, chronic obstructive pulmonary disease (COPD), and more.
Why Are People Filing Dupixent Lawsuits?
A 2024 peer-reviewed study found that atopic dermatitis patients who took dupilumab were more than four times as likely to develop CTCL, a rare form of skin cancer that develops in white blood cells. As of late 2024, the FDA has received reports of a potential link between Dupixent and CTCL and is still evaluating whether to take additional regulatory action.
Those impacted by Dupixent use have accused its manufacturers, Regeneron Pharmaceuticals Inc. and Sanofi-Aventis U.S. LLC, of failing to adequately warn customers and health care providers about its apparent link to CTCL. The drug’s marketing and labeling do not disclose the alleged cancer risk, victims claim.
What Claims Are Being Made in Dupixent Lawsuits?
A wrongful death lawsuit filed in October 2025 in a Tennessee federal court accused Dupixent’s manufacturers of negligence in a Nashville woman’s cancer death the year prior. According to the complaint, Chandra Richardson, the daughter of Cynthia Marie Hyde, claims her mother died from untreatable lymphoma months after being prescribed Dupixent in June 2024. Richardson claimed Hyde likely had dormant CTCL that was turned into a “fatal malignancy” by Dupixent.
Richardson’s allegations against Regeneron and Sanofi-Aventis include:
- The manufacturers knew or should have known of the apparent links between Dupixent and CTCL and are liable for failing to warn patients and doctors.
- The manufacturers were negligent in continuing to market and sell a drug they knew had fatal risks while claiming it was safe.
- The manufacturers are liable for Hyde’s wrongful death by failing to inform her or her doctors about Dupixent’s risks.
Who Are the Defendants?
Regeneron and Sanofi-Aventis are publicly traded pharmaceutical giants responsible for developing and manufacturing Dupixent. Most CTCL lawsuits regarding dupilumab will likely include the two companies as defendants. Other companies involved in the production, sale, and distribution of Dupixent may also be liable.
Why Choose NST Law for Your Dupixent Case?
We’re passionate about leveling the playing field between regular people and powerful companies. Since our founding in 1990, NST Law has developed a reputation for specialized experience and successful representation in product liability and mass tort cases against large pharmaceutical corporations.
Our firm’s nationwide presence, connections with medical experts, and in-depth knowledge of legal complexities have helped us win billions for our clients while prioritizing compassionate, personalized care and community involvement. Our representation comes risk-free: you pay absolutely nothing upfront, and we won’t charge any fees unless you win your case.
Successful Case Results
- Recovered $4,850,000,000: Our firm represented 66 clients in national Vioxx class action litigation against drug manufacturer Merck, resulting in global settlement of $4,850,000,000.00 to all members of the class.
- Recovered $66,000,000: Clients represented by our firm received shares of a $66,000,000.00 pharmaceutical drug settlement regarding Bextra and Celebrex injury claims following multidistrict litigation.
Hear from NST Law’s Satisfied Clients
NST did an outstanding job with my case they were very professional. They kept me in the loop concerning everything that was going on with my case and I was always notified at every point in the case with what was being done. “NST is certainly the way to go”. Thank you.”
Our experience with this firm was excellent. They called us with updates about our case on a regular bases. Courteous and friendly staff. This firm is quick to get back with you on any questions you may have. We would recommend them to anyone who is in need of a law firm.”
“NST was very helpful with my case. They made sure that I was informed on everything that was going on and always kept in contact with me to keep me updated.”
Who Can Qualify to File a Dupixent Lawsuit?
Those most likely to be eligible for a Dupixent lawsuit meet the following three criteria:
- The patient used Dupixent as prescribed by their doctor.
- The patient was diagnosed with a form of CTCL or another serious immune condition, including mycosis fungoides and Sézary syndrome.
- The patient’s medical records indicate a reasonable correlation between the time they started taking Dupixent and the time of their diagnosis, typically between one and two years.
Our knowledgeable attorneys can help analyze your circumstances in a free case review to determine whether you might qualify for a Dupixent lawsuit.
Signs and Symptoms of T-Cell Lymphoma
Cutaneous T-cell lymphomas are rare types of cancer that harm the body’s skin and immune system through its white blood cells. The most common forms of CTCL are mycosis fungoides, in which the cancer is limited to the skin, and Sézary syndrome, in which the cancer spreads to the bloodstream. CTCL is generally incurable, but those diagnosed early can often survive for many years with treatment.
Early warning signs of CTCL include:
- Persistent skin rashes or raised patches that don’t heal
- Discolored skin
- Itching, redness, or scaling
- Swollen lymph nodes or skin bumps
- Fatigue or unexplained weight loss
Unfortunately, signs of CTCL often overlap with atopic dermatitis symptoms, making it harder for patients to detect it early. It’s important to closely monitor your health while using Dupixent and see a doctor immediately if you develop any of these symptoms.
What Are the Statutes of Limitations and Discovery Rules for Dupixent Lawsuits?
The deadline to file a product liability or defective drug lawsuit varies by state, depending on its statute of limitations. The deadline typically begins on the date of your diagnosis, though state “discovery rules” may push back the timeline if the injury wasn’t immediately obvious.
Mass tort lawsuits involving defective drugs can often take multiple years to resolve, so it’s important to join them as early as possible after your diagnosis. Make sure to preserve any relevant medical records to prove your case is within the statute of limitations.
What Happens During a Dupixent Lawsuit?
Common steps involved in a defective drug lawsuit include:
- Attorneys will investigate victims’ specific circumstances, building evidence linking their Dupixent use to their diagnosis.
- Lawyers will file individual complaints against dupilumab manufacturers, accusing them of causing harm to their clients.
- The cases may be merged into a multi-district litigation (MDL), a type of consolidated case used to streamline multiple similar claims across various federal courts.
- Each side’s lawyers will engage in discovery, sharing medical records and internal documents to build their cases.
- The parties will engage in settlement negotiations to discuss terms that could potentially resolve the claims without trial.
- The court will conduct bellwether trials, which are jury trials for specific cases used to gauge the potential results of the other claims.
- The results of the bellwether trials are likely to influence settlement terms, prompting the parties to resolve the remaining cases.
What Compensation Is Available in a Dupixent Lawsuit?
Injury victims can recover damages to compensate for various losses related to the other party’s negligence. Compensatory damages typically fall into two categories:
- Economic damages are financial losses with a specific monetary value, such as medical bills, future treatment costs, lost wages, and reduced earning capacity.
- Non-economic damages compensate for subjective impacts to the victim’s well-being, including pain and suffering, emotional distress, loss of consortium, and loss of enjoyment of life.
What Factors Can Influence the Value of My Dupixent Lawsuit?
Damages tend to be greater the more severe your injuries are. Injury severity influences the extent of most damages, as more time spent in treatment results in higher medical bills, greater lost income from missing work, and a heavier psychological burden.
The strength of available evidence can also impact the value of your case. If an insurance company doesn’t think you have a strong enough case to win at trial, it may offer you much less than your damages are worth.
How Do Lawyers Evaluate Dupixent Lawsuits?
When investigating a victim’s claims and building a case for a Dupixent injury, an attorney may depend on the following types of evidence:
- Medical records detailing the victim’s original condition, such as eczema
- Documents showing the victim’s Dupixent prescription and the dates it was administered
- Biopsy reports confirming the patient’s CTCL diagnosis
- Notes from the victim’s doctors
- Other imaging and test results
- A timeline showing the patient’s symptoms began after using Dupixent
Our experienced defective drug lawyers can walk you through the evidence available in your case and how they’ll use it to build your Dupixent lawsuit.
Cases Investigated
We’re dedicated to getting justice for our clients and holding powerful drug companies accountable. NST Law’s experienced team is currently reviewing claims for a variety of other prescription drugs and medications, including:
Frequently Asked Questions (FAQs)
While recent studies have shown a potential link between Dupixent use and the risk of developing CTCL, a causal relationship between the two has not been fully proven.
There is no MDL yet for Dupixent lawsuits, as only a few individuals have filed claims thus far.
There has not yet been a recall for Dupixent. As of late 2024, the FDA is still evaluating further action.
No Dupixent lawsuits have been completed yet, so it’s impossible to provide an exact timeline. Our knowledgeable Dupixent lawsuit lawyers can analyze your case and estimate roughly how long it may take for you to see results.
Gather any medical records establishing your Dupixent use and CTCL diagnosis. Our Dupixent lawsuit lawyers can help you collect all the necessary information.
Our Dupixent lawsuit attorneys don’t charge any fees upfront, and you won’t owe us anything unless you win your case.
Call NST Law for a Free Consultation Today
For over 35 years, NST Law has helped clients like you stand up to powerful companies and get the justice they deserve. If you’ve been diagnosed with CTCL after taking Dupixent, our trusted lawyers are ready to help. Contact us online or call 800-529-4004 today for a free consultation.