Tepezza Hearing Loss & Tinnitus Lawsuit 2026: Who Qualifies, Settlements & Process
Got ear fullness or tinnitus after Tepezza? Here’s whether you may have a claim
The short answer: if you received Tepezza (teprotumumab) in the United States and developed permanent hearing loss or chronic tinnitus, you may have a product liability claim. The central allegation is failure to warn, that the manufacturer did not adequately warn patients and prescribing doctors about the drug’s risk of hearing damage (ototoxicity). Tepezza is an infusion used for thyroid eye disease (TED) to reduce eye bulging and double vision, and a subset of patients have reported ear fullness, autophony, tinnitus, and sensorineural hearing loss, prompting lawsuits across the country.
This guide is written for U.S. plaintiffs. It walks through who may qualify, what you must prove, how settlements and attorney fees are structured, the statute of limitations, and the litigation timeline. Whether you actually have a claim, and what it may be worth, depends on your facts and requires a consultation with a licensed attorney.
What is Tepezza, and why did hearing become an issue?
Tepezza is a monoclonal antibody that targets the IGF-1 receptor involved in thyroid eye disease. It drew attention for reducing eye bulging and double vision, but clinical and post-marketing reports repeatedly flagged hearing-related adverse events. The symptoms patients most often describe include:
- Tinnitus: ringing or buzzing in the ears with no external sound
- Autophony: hearing your own voice or breathing unusually loudly inside the ear
- Ear fullness or pressure: a persistent plugged feeling, like cabin pressure on a plane
- Sensorineural hearing loss: permanent loss, often beginning in higher frequencies
- Hyperacusis: everyday sounds perceived as abnormally loud or painful
The legal fight centers on whether these effects were temporary and resolved after stopping the drug, or permanent damage that remained afterward. Plaintiffs argue that permanent cases are not rare and that the manufacturer’s labeling and warnings fell short of what it knew or should have known.
The core theory: what is “failure to warn”?
Failure to warn is a familiar theory in U.S. pharmaceutical litigation. Even if a drug is not so dangerous that it should be pulled from the market, a manufacturer can still be liable if it failed to adequately warn patients and prescribing doctors about a known risk.
A related concept is the “learned intermediary doctrine.” Manufacturers generally satisfy their duty by warning the prescribing physician rather than the patient directly. So plaintiffs try to show that a stronger label would have changed how the doctor prescribed or monitored treatment, while defendants argue the label was adequate and that the hearing damage came from another cause. The timing, dose relationship, and exclusion of alternative causes between infusion and injury often decide these cases.
Who can file? An eligibility checklist
An attorney makes the final call after reviewing your records, but cases generally get stronger as more of these factors line up.
| Factor | Stronger case | Weaker or likely excluded |
|---|---|---|
| Documented use | Clear record of Tepezza infusions | Uncertain records, confusion with other drugs |
| Number of infusions | Multiple documented infusions | Fewer than one cycle, missing data |
| Symptom timing | Hearing symptoms during or shortly after infusion | Onset unrelated to treatment, pre-existing loss |
| Permanence | Damage persists after stopping the drug | Full recovery, no lasting effect |
| Objective proof | Before-and-after audiograms available | No hearing testing on file |
| Alternative causes | Few competing causes (noise, aging) | Heavy occupational noise, major underlying disease |
Two things matter most. First, you need medical records proving you received the drug and how many infusions you had. Second, you need objective evidence such as an audiogram showing the injury. A normal pre-treatment audiogram that worsened after infusions strongly supports causation.
What must be proven? The elements of the claim
In a product liability, failure-to-warn case, a plaintiff generally must address the following elements:
- Exposure: that you actually received Tepezza, and to what extent
- Injury: that a specific hearing injury such as permanent loss or tinnitus exists
- Causation: that the injury came from the drug, not another cause
- Defect / inadequate warning: that the label and warnings fell short of the known risk
- Damages: medical costs, lost income, hearing aids and rehab, and pain and suffering
Causation is the most contested element. Hearing is affected by aging, noise exposure, other ototoxic drugs, and underlying conditions, so the defense will argue “another cause, not the drug.” That is why before-and-after audiograms, prescribing and infusion records, and expert opinion ruling out other risk factors carry so much weight.
How does the process work? The litigation timeline
Tepezza hearing loss cases have moved toward consolidation as an MDL (multidistrict litigation), which gathers similar federal lawsuits before one judge. Unlike a class action, each plaintiff keeps an individual claim; only discovery and common issues are handled together. The usual stages look like this:
| Stage | What happens | What the plaintiff does |
|---|---|---|
| 1. Intake | Attorney reviews eligibility and records | Provide medical and pharmacy records |
| 2. Filing | Individual complaint filed, joined to MDL | Sign retainer, supply documentation |
| 3. Discovery | Both sides exchange documents and testimony | Cooperate with questionnaires and statements |
| 4. Bellwether | Test trials gauge case value | (Usually not a direct party) |
| 5. Settlement or trial | Tiered settlement or individual resolution | Review and decide on settlement terms |
| 6. Payout | Fees and costs deducted from recovery | Receive net proceeds |
The exact MDL case number, court, and current stage can change over time, so you should confirm the latest status through counsel using official records such as PACER. This article explains the general structure and does not assert the fixed status of any specific case.
How are settlements and costs structured?
Mass tort settlements are usually built on a tier system. The more permanent and severe the injury, the more infusions received, and the larger the medical costs and lost income, the higher the tier and the larger the compensation. Below are factors that influence value (not a guarantee of any amount).
| Value driver | Effect on compensation |
|---|---|
| Permanence of injury | Permanent loss or severe tinnitus raises value |
| Number and duration of infusions | More or longer treatment strengthens causation and value |
| Objective evidence | Before-and-after audiograms raise value |
| Economic damages | Larger hearing aid, rehab, and income loss raise value |
| Non-economic damages | Reduced quality of life and suffering counted |
| Competing causes | Significant noise or aging exposure lowers value |
No one can guarantee a specific settlement figure. Definite dollar amounts online are usually marketing. To understand how mass tort payouts and timelines generally work, see the guide below.
How are attorney fees (contingency) set?
Most product liability and mass tort attorneys work on a contingency fee. The key points:
- No upfront fee: you generally do not pay attorney fees out of pocket to start
- Paid only on recovery: the attorney earns a percentage only if you recover money
- Typical range: commonly 33% to 40% of the recovery, sometimes varying by case stage
- Case costs are separate: medical records, expert fees, and court costs may be itemized apart from the fee
- Read the retainer: confirm the rate, how costs are handled, and who bears them if you lose
For how contingency fees generally work and what to negotiate, see the guide below.
Statute of limitations: the most urgent variable
The first thing to confirm is the statute of limitations. Deadlines vary by state and usually run from when you knew, or reasonably should have known, of the injury and its cause (the discovery rule). Drug side-effect cases are tricky because patients often connect symptoms to the drug only later, which complicates the start date.
If you miss the deadline, your claim can be dismissed regardless of the merits. So if you experienced hearing symptoms after Tepezza, confirm your state’s exact deadline with an attorney as soon as you become aware of the issue. Do not estimate the deadline on your own.
How does this compare to similar drug lawsuits?
The Tepezza hearing loss litigation is structurally similar to other pharmaceutical mass torts in which an FDA-approved drug allegedly caused a specific long-term side effect after marketing. For example, cases involving vision damage share much of the same proof and procedural pattern.
These cases share four traits: the importance of objective testing (audiograms, eye exams), heavily contested causation, tiered settlements, and contingency-fee representation. Understanding one helps you read the structure of the next.
What should you do first? A practical checklist
- Gather medical and pharmacy records: collect infusion dates, the number of infusions, and hearing test results
- Organize your audiograms: check whether you have testing that allows a before-and-after comparison
- Document symptoms: note when tinnitus or hearing loss began and how it affects work and daily life
- Confirm the statute of limitations: ask an attorney about your state’s deadline immediately
- Consult a contingency-fee attorney: use a free consultation to confirm eligibility and rate, and review the retainer
- Be wary of absolute ads: treat guaranteed amounts or instant settlement promises with caution
Related reading
- Tepezza hearing loss MDL 3079 lawsuit, in depth
- Mass tort settlement payout timeline
- Personal injury attorney fees explained
- Elmiron maculopathy and vision loss lawsuit
This article is for general information only and is not legal or medical advice. Tepezza is a prescription medication used at a physician’s discretion, and whether you have a claim, what it may be worth, and the applicable statute of limitations depend on your facts and your state. Do not stop or change any medication without consulting your healthcare provider, and decide whether to pursue a claim only after speaking with a qualified attorney.
What does the Tepezza hearing loss lawsuit claim?
It is a U.S. product liability lawsuit brought by patients who say they developed permanent hearing loss, tinnitus, ear fullness, or hyperacusis after receiving Tepezza (teprotumumab). The core legal theory is failure to warn: that the manufacturer knew or should have known of the ototoxicity risk yet did not adequately warn patients and prescribing physicians. Plaintiffs seek compensation for medical costs and other damages.
Who is the defendant?
The primary defendant is Horizon Therapeutics, which developed and marketed Tepezza. Because Amgen acquired Horizon in 2023, current litigation responsibility flows through the Amgen corporate family. Affiliated or distributing entities may also be named depending on the case.
Which symptoms may qualify?
Permanent sensorineural hearing loss, chronic tinnitus, autophony, hyperacusis, and persistent ear fullness are most commonly cited. Claims involving lasting damage that continued after stopping the drug or required hearing aids or rehabilitation tend to be valued more highly than mild, fully reversible symptoms.
Do I need an audiogram to file a claim?
Practically speaking, yes. An audiogram or similar objective hearing test is the central evidence of injury. A before-and-after comparison around the infusion period makes causation far easier to establish. If you have no testing on file, an attorney can help obtain medical records and arrange additional evaluation.
What is an MDL and how does it relate to this case?
An MDL (multidistrict litigation) consolidates similar federal lawsuits before one judge to handle discovery and common issues efficiently, while each plaintiff keeps an individual claim. Tepezza hearing loss cases have moved toward this kind of federal consolidation. The exact case number, court, and current status should be confirmed through counsel using official records such as PACER.
How much could a settlement be worth?
There is no fixed amount. In mass torts, individual recovery is usually tiered based on injury severity, permanence, number of infusions, medical costs, lost income, and pain and suffering. Permanent hearing loss or severe tinnitus may fall into higher tiers, but no attorney can guarantee a specific figure.
How do attorney fees work?
Most product liability and mass tort attorneys work on a contingency fee. You typically pay no upfront fee; the attorney is paid a percentage of any recovery (commonly in the 33% to 40% range) and collects nothing if there is no recovery. Case costs such as medical records and expert fees may be handled separately, so review the retainer agreement carefully.
What is the statute of limitations?
The statute of limitations varies by state and usually runs from when you knew, or reasonably should have known, of the injury and its cause (the discovery rule). Missing the deadline can bar your claim entirely, so it is the most urgent variable. Confirm your state's exact deadline with an attorney right away.
I stopped the drug and my hearing improved. Can I still file?
If you fully recovered with no lasting effect, the claim value may be low. But if you incurred medical costs or symptoms persist or recur, a consultation may still be worthwhile. Recovery is best judged objectively through audiograms and clinical records rather than self-assessment.
Is this a class action or individual lawsuit?
It is generally pursued as individual lawsuits coordinated within an MDL, not a single class action. That means your damages are evaluated on your own facts, your injury, infusion history, and losses, rather than divided equally among a class.
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