Find Out If You Have a Case
Free, confidential review by Attorney Matthew T. Marin. Prefer to talk? Call (888) 348-2735.
Dupixent Lawsuit — Free, Confidential Case Review
Helping a loved one with lymphoma after Dupixent?
You can start the review for them — or for their estate. Caregivers and family members do this every day.
ACTIVE LITIGATION — NO SETTLEMENT. MDL 3180 underway · filing deadlines vary by state.
Were you — or someone you love — diagnosed with CTCL or another T-cell lymphoma after taking Dupixent?
Check if my case qualifiesfree · confidential · takes 2 minutes
I’m not sure of my exact diagnosis →
No documents needed · confidential · an answer either way · no fee unless there is a recovery. Court costs and litigation expenses are advanced by counsel and repaid from the recovery. You are not responsible for court costs or litigation expenses if there is no recovery, unless a court directs otherwise. The attorney’s fee is a percentage of the gross recovery, calculated before expenses are deducted.
Or talk to a person now: (888) 348-2735 — answered 24/7
Stefanie A. Murphy & Matthew T. Marin
Partners
Every Dupixent inquiry gets a personal review — and an honest answer either way, free and without obligation.
Claims are brought against Sanofi and Regeneron, the makers of Dupixent — not against your doctor. Conversations are confidential. Some matters may be referred to other lawyers. No settlement has been reached, and most cases are in their earliest stages; every case must be proven on its own facts. Attorney Advertising.
Yes — you can start this conversation for someone else, and you do not need power of attorney to do it. A family member can call, describe what happened, ask questions, and find out whether the criteria fit. Signing a records authorization or an engagement agreement for another adult is the part that requires written permission or a legal appointment. Intake expects callers who are not the patient and asks about it as a matter of routine — it is a normal call, not an exception.
Lawsuits consolidated in MDL 3180 (D.N.J.) allege that Dupixent (dupilumab) is associated with an increased risk of cutaneous T-cell lymphoma (CTCL) and that the manufacturers failed to warn about it. No court has ruled on these allegations, no settlement exists, and the litigation is in its earliest stages. Published studies report a statistical association — which the study authors themselves note does not establish causation — and the FDA has identified a potential safety signal it is still evaluating; Dupixent’s FDA label does not currently warn about lymphoma. Whether any individual has a claim depends on their medical records and the law of their state.
This page is about a lawsuit — it is not medical advice, and filing a claim does not require you to stop taking Dupixent. Decisions about your medication belong with you and your doctor.
What can you do without power of attorney?
More than most people assume. Without any document at all, you can call and describe the situation, ask what the criteria are and whether they appear to fit, ask how the process works, gather information to bring back to your family member, and leave your own contact details so someone can follow up with the two of you together.
What you cannot do is sign on another competent adult’s behalf. Records authorizations and engagement agreements need the signature of the person whose records and claim they are, or of someone with written permission to sign for them. That line exists to protect your family member, and it is the same line every reputable firm draws.
What does a power of attorney or similar authorization enable?
A written authorization — a durable power of attorney, a health-care proxy, a guardianship order, or a court-appointed representative’s letters — lets one person act for another within whatever scope the document sets. Depending on what it says and what state law allows, that can include requesting medical records, signing authorizations, and entering into agreements.
The practical answer is that these documents differ enormously, so a copy is usually requested and read rather than assumed. If a document exists, bring it up on the first call. If none exists and your family member cannot act for themselves, say that too — it is a solvable situation, and it is better addressed at the start than discovered later.
What happens when the caller is not the patient?
Intake asks a short set of questions: your name, your relationship to the person, why you are calling rather than they are, and whether any power of attorney or similar authorization exists. Every caller who is not the patient gets these questions. Nobody is being screened out by them.
From there the conversation is the same as any other: which condition the drug was prescribed for, roughly when it started and stopped, what the diagnosis was and when it came, and where treatment happened. If you do not know an answer, say so — pharmacy and medical records fill most gaps. The criteria themselves are on our do I qualify page if you would rather read them before you call, and the broader Dupixent lawsuit overview explains what the litigation actually alleges.
Free Confidential Evaluation — No Fee Unless There Is a Recovery
Call (888) 348-2735 or use the confidential case review form on this page.
Court costs and litigation expenses are advanced by counsel and repaid from the recovery. You are not responsible for court costs or litigation expenses if there is no recovery, unless a court directs otherwise. The attorney’s fee is a percentage of the gross recovery, calculated before expenses are deducted.
What if the person you are calling about has died?
Then a different route applies, and it is a gentler one. Claims can be brought on behalf of someone who has died, generally through their estate, and the questions shift to the date of death, where they lived, and whether an estate has been opened. Our wrongful death page covers that path in full, including what happens when no estate exists yet. There is no need to have anything arranged before you reach out.
What if your family member does not want to do this?
Then it stops there, and that is the right outcome. An adult who can make decisions makes this one. Caregivers sometimes arrive angrier and more certain than the patient — that is a well-recognized pattern, not a character flaw — and the useful move is usually to gather information and hand it over rather than push.
It is also worth saying plainly: nothing in a claim asks anyone to stop taking Dupixent, and nobody here gives medication advice. If the hesitation is really about the drug that finally worked, that fear is addressable, and it belongs in a conversation with the prescriber rather than in a decision about a lawsuit.
Two other hesitations come up often enough to name. Some people do not want to be seen as suing over a drug they recommended to friends; nothing about a claim requires them to say the drug never helped. And some do not want the disruption while they are in active treatment; a review is a phone call, and it can wait for a better week.
What actually helps, if you want to be useful?
Caregivers frequently hold the documentation the patient never kept. Two concrete things are worth doing. Put whatever exists in one place: pharmacy paperwork, injection cartons and packaging, letters from the manufacturer or a copay program, insurance correspondence, appointment summaries. And write down the timeline while it is fresh — when the drug started, when the skin changed, when the biopsy happened, when the diagnosis came. Our page on what to save evidence lists what each item is good for. None of it is required, and anything missing can usually be requested.
Free Confidential Evaluation — No Fee Unless There Is a Recovery
Call (888) 348-2735 or use the confidential case review form on this page. Marin & Murphy Law Firm is currently accepting Dupixent CTCL cases.
Court costs and litigation expenses are advanced by counsel and repaid from the recovery. You are not responsible for court costs or litigation expenses if there is no recovery, unless a court directs otherwise. The attorney’s fee is a percentage of the gross recovery, calculated before expenses are deducted.
What else do families ask when they call on someone else’s behalf?
Can I ask about a Dupixent claim for my spouse or parent?
Yes. Families start these conversations all the time, and intake is built to expect it. You can describe what happened, ask questions, and find out whether the criteria fit. What you cannot do without written permission is sign an agreement or a records authorization for another adult.
Do I need power of attorney to make the call?
No. A first conversation requires no legal paperwork at all. A power of attorney or a similar written authorization matters later, if the person you are calling for cannot sign for themselves and someone else needs to act on their behalf.
What does a power of attorney actually let me do?
It depends on the document and on state law. A written authorization can let one adult sign, request records, and make decisions for another within the scope the document sets. Reviewing what a particular document covers is part of a case review, and a copy is usually requested if one exists.
Will they ask who I am?
Yes, and it is routine. Intake records the caller’s name, relationship to the patient, the reason they are calling instead of the patient, and whether any power of attorney exists. It is a standard set of questions, not a test, and it is asked of every caller who is not the patient.
What if my family member does not want to pursue anything?
Then nothing goes forward. An adult who can make their own decisions decides whether to bring a claim, full stop. You are welcome to gather information and hand it to them; many families do exactly that and leave the decision where it belongs.
My child is on Dupixent and I am worried. Is there a claim?
The criteria require a cutaneous T-cell lymphoma or related qualifying lymphoma diagnosis during or after Dupixent use. Worry without a diagnosis does not meet them, and a law firm is the wrong place to bring a medical question about a child. Concerns about a rash or a symptom belong with your pediatrician or dermatologist.
What can I do that actually helps?
Two things, mostly: put whatever documents exist in one place — pharmacy paperwork, injection packaging, letters from the manufacturer or insurer — and write down the timeline while you remember it, including roughly when the drug was started and when the diagnosis came. Both save considerable reconstruction later.
Does the patient have to be on the call?
Not for a first conversation. At some point the person bringing the claim does need to be directly involved, because they are the one who signs authorizations and any engagement agreement — unless a written authorization gives someone else that role. Early on, a family member calling alone is completely ordinary.
Sources
- Caller-not-patient intake fields (caller name, relationship, reason for calling, power of attorney) and the deceased-branch fields, per the referring counsel intake criteria dated February 6, 2026 (on file with Marin & Murphy Law Firm).
- Qualifying-diagnosis criteria, including the requirement of a qualifying lymphoma diagnosis during or after Dupixent use and the absence of any minimum duration — same criteria document, February 6, 2026 (on file).
- General description of powers of attorney, health-care proxies, guardianship, and who may sign for another adult (general background; these rules vary by state)
Matthew T. Marin — RI, CT, MA, SC, U.S.D.C. D.R.I. · Stefanie A. Murphy — RI, CT, MA, U.S.D.C. D.R.I./D.Conn./D.Mass.
Attorney Advertising.
Attorney Advertising. This page is for general information and is not legal advice; reading it does not create an attorney-client relationship, and no attorney-client relationship is formed until a written engagement agreement is signed. Marin & Murphy Law Firm attorneys are licensed in Rhode Island, Connecticut, Massachusetts, and South Carolina; the firm’s mass-tort practice is directed from its Charleston, South Carolina office. Responsible attorney: Matthew T. Marin, 997 Morrison Drive, Suite 200, Charleston, SC 29403. Cases may be handled together with co-counsel; whether a claim is accepted is determined after review. No representation is made that the quality of legal services is greater than that of other lawyers. Prior results do not guarantee a similar outcome; every case depends on its own facts.