Tepezza Hearing Loss Lawsuit: Compensation for Ototoxic Injuries

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Patients across the country who received Tepezza infusions to treat thyroid eye disease are now facing unexpected and often permanent hearing problems. If you developed hearing loss, tinnitus, muffled hearing, or ear fullness during or after Tepezza treatment, you may have the right to pursue compensation from the manufacturer.

At Ferrer Poirot Feller, we’re fighting for individuals who trusted Tepezza as the first FDA-approved treatment for thyroid eye disease, only to trade one debilitating condition for another. Tepezza offered hope to people suffering from the painful and disfiguring effects of thyroid eye disease. But many patients discovered too late that the medication carried significant risks of permanent hearing damage that weren’t properly disclosed.

Our attorneys are here to help you understand what happened to your hearing, why Horizon Therapeutics should have warned you about these risks, and how you can seek accountability.

 Call Ferrer Poirot Feller today at (214) 521-4412 for a free, confidential case evaluation. You won’t pay anything unless we win your case.

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Key Takeaways for Tepezza Hearing Loss Lawsuits

• Federal cases are consolidated in MDL 3079 in the Northern District of Illinois under Judge Thomas M. Durkin, with more than 270 cases filed and periodic status conferences ongoing
• Alleged injuries include sensorineural hearing loss, tinnitus (ringing in the ears), muffled hearing, ear fullness, and permanent hearing damage that emerged during or shortly after Tepezza infusions
• The FDA required label updates, adding warnings about hearing impairment, including hearing loss, after post-market reports revealed the extent of ototoxic risks
• The primary defendant is Horizon Therapeutics (now owned by Amgen), the manufacturer of Tepezza, facing failure-to-warn claims for inadequate disclosure of hearing risks
• Strong cases require documentation, including baseline hearing tests before Tepezza, audiograms showing hearing loss after treatment, infusion records, and ENT or audiology evaluations

Why Hire Ferrer Poirot Feller for Your Tepezza Hearing Loss Claim

Tepezza hearing loss cases require attorneys who understand both the unique medical aspects of ototoxicity and the legal principles governing pharmaceutical failure-to-warn claims.

These cases involve specialized medical evidence, including audiometric testing, otolaryngology evaluations, and expert testimony regarding drug-induced hearing damage. You need a legal team that knows how to work with audiologists and ENT specialists to build compelling cases.

At Ferrer Poirot Feller, we’ve dedicated more than 35 years to holding pharmaceutical companies accountable when their products cause harm. We understand how devastating hearing loss can be, and we also recognize that for many Tepezza patients, the choice seemed impossible: lose your sight or lose your hearing.

We work with leading otologists, audiologists, and medical experts who can review your hearing tests, analyze the timeline of your symptoms, and establish the connection between Tepezza infusions and your hearing damage.

You don’t need to face Horizon Therapeutics and Amgen alone. Call our Tepezza litigation attorneys today at (214) 521-4412 for a free consultation.

The Link Between Tepezza and Hearing Loss

Tepezza (teprotumumab) is a monoclonal antibody treatment approved by the FDA in 2020 for thyroid eye disease (also called Graves’ ophthalmopathy or thyroid-associated orbitopathy). The medication works by blocking the insulin-like growth factor-1 receptor (IGF-1R), which plays a role in the inflammation and tissue expansion that causes eye bulging, double vision, and other symptoms of thyroid eye disease.

The treatment consists of eight intravenous infusions administered over approximately 21 weeks. For many patients, Tepezza provided significant improvement in eye symptoms. But clinical trials and post-market surveillance revealed a troubling side effect: hearing problems.

Studies and case reports documented patients developing sensorineural hearing loss during or shortly after Tepezza treatment. Some patients noticed symptoms during the infusion series, including:

• Sudden hearing loss or gradual hearing decline
• Tinnitus (ringing, buzzing, or roaring sounds in the ears)
• Muffled or distorted hearing
• Ear fullness or pressure
• Difficulty understanding speech, especially in noisy environments
• Sensitivity to certain sounds

For some patients, hearing problems improved after stopping treatment. But for many others, the hearing loss proved permanent.

What Is the Tepezza Hearing Loss MDL and Where Is It?

Because multiple individual lawsuits were filed in federal courts across the country, the U.S. Judicial Panel on Multidistrict Litigation consolidated these cases into a single proceeding. The Tepezza hearing loss cases are consolidated in MDL 3079 in the Northern District of Illinois under Judge Thomas M. Durkin.

As of early November 2025, there are approximately 272 pending cases in the Tepezza Hearing Loss MDL. The court holds periodic status conferences to manage discovery, expert witness deadlines, and preparation for potential bellwether trials.

What Does This Mean for Your Case?

MDL 3079 is not a class action. With an MDL, each plaintiff maintains an individual claim, characterized by unique medical histories, treatment patterns, and hearing damage. However, pretrial work such as document discovery, depositions, and legal arguments is handled collectively.

The court will likely select bellwether cases (representative test cases that go to trial first) to help both sides evaluate the strength of claims and potential compensation ranges. These trials often lead to settlement negotiations.

Strong cases require solid medical documentation. Patients with baseline hearing tests before Tepezza, audiograms showing hearing decline after treatment, and ENT evaluations confirming ototoxic damage have the strongest claims.

Who Are the Defendants in Tepezza Hearing Loss Lawsuits?

The lawsuits name the pharmaceutical companies responsible for manufacturing and marketing Tepezza without adequate warnings:

• Horizon Therapeutics, the original manufacturer and marketer of Tepezza who brought the drug to market and promoted it to physicians and patients
• Amgen, which acquired Horizon Therapeutics in 2023 and now owns the Tepezza product line

The lawsuits allege that Horizon Therapeutics knew or should have known about the ototoxic risks of Tepezza from clinical trial data, post-market reports, and the scientific literature on IGF-1R inhibition and hearing function. Despite this knowledge, the company failed to adequately warn patients and doctors about the risk, severity, and potential permanence of hearing loss associated with the medication.

The failure-to-warn allegations focus on inadequate disclosure of hearing risks in the drug’s labeling, promotional materials, and communications with healthcare providers. Many patients report they were never told about hearing loss as a potential side effect before starting treatment.

Did the FDA Update the Tepezza Label About Hearing Risks?

Yes. Following reports of hearing problems in Tepezza patients, the FDA required updates to the medication’s labeling. The current Tepezza label includes warnings about hearing impairment, including hearing loss, as a potential adverse reaction.

The label now advises healthcare providers to assess patients’ hearing before, during, and after treatment, and instructs patients to contact their doctor if they experience changes in hearing. The label also notes that hearing impairment, including hearing loss, has been reported in clinical trials and post-marketing surveillance.

However, these warnings came after thousands of patients had already received Tepezza infusions. Many patients treated in 2020, 2021, and 2022 received inadequate information about hearing risks. Some were never told to get baseline hearing tests before starting treatment, making it difficult to document the extent of damage caused by the medication.

Do You Qualify for a Tepezza Hearing Loss Lawsuit?

You don’t need complete medical records before reaching out to an attorney. You just need to know that your hearing changed after receiving Tepezza. You may have a claim if:

• You received Tepezza (teprotumumab) infusions to treat thyroid eye disease
• You developed hearing problems during or after your treatment course, including hearing loss, tinnitus, muffled hearing, or ear fullness
• You have medical documentation of your hearing changes, such as audiograms, ENT evaluations, or hearing aid prescriptions
• Your hearing problems began during the infusion series or within several months of completing treatment
• Your state’s statute of limitations hasn’t expired for your potential claim

Ideally, you have baseline hearing tests from before Tepezza treatment and follow-up audiograms showing measurable hearing decline. However, even without baseline tests, documentation of new hearing problems that began after starting Tepezza might support a claim, particularly if ENT evaluations confirm ototoxic damage.

At Ferrer Poirot Feller, we’ll work with you to gather your medical records, review your hearing test results, and evaluate whether you have a viable claim. Call a drug injury lawyer at (214) 521-4412 for a free case evaluation.

What Evidence Strengthens a Tepezza Hearing Loss Claim?

Building a strong Tepezza hearing loss case requires documentation connecting your infusions to your hearing damage. Key evidence includes:

• Baseline audiogram (hearing test) performed before starting Tepezza, showing your hearing levels prior to treatment
• Post-treatment audiograms demonstrating hearing loss or changes in hearing thresholds after Tepezza infusions
• Infusion records documenting the dates, dosages, and number of Tepezza treatments you received
• ENT or audiology evaluations diagnosing hearing loss, tinnitus, or other ototoxic injuries
• Medical records documenting complaints of hearing changes, tinnitus, or ear problems during or after treatment
• Hearing aid prescriptions or cochlear implant records if your hearing loss required assistive devices
• Tinnitus treatment records if you sought care for ringing in the ears
• Documentation ruling out other causes of hearing loss, such as infections, noise exposure, or other ototoxic medications

Baseline hearing tests are particularly valuable because they provide objective evidence of your hearing before Tepezza, making it easier to demonstrate that the medication caused measurable damage. 

If you didn’t have baseline testing but developed hearing problems after starting Tepezza, ENT evaluations can still establish ototoxic injury through diagnostic testing and clinical examination.

What Compensation Might Be Available?

If you pursue a successful Tepezza hearing loss claim, compensation might include:

• Medical expenses, including audiograms, ENT consultations, hearing aids, cochlear implants, tinnitus treatment, and ongoing audiology care
• Future medical costs, such as hearing aid replacements, cochlear implant maintenance, audiology follow-ups, and assistive listening devices
• Lost income, if hearing loss affected your ability to work or required career changes
• Loss of earning capacity, if permanent hearing damage limits your future employment options
• Pain and suffering, reflecting the physical discomfort and limitations caused by hearing loss and tinnitus
• Emotional distress, acknowledging the psychological impact of hearing disability, isolation, and communication difficulties
• Loss of quality of life, including difficulty participating in conversations, enjoying music or entertainment, and maintaining relationships

The value of your case depends on the severity and permanence of your hearing loss, whether you require hearing aids or other interventions, and how the damage has affected your daily life and ability to work.

What to Expect When Filing a Tepezza Hearing Loss Lawsuit

Filing a Tepezza hearing loss claim begins with understanding what happened to you and whether the law provides a path to compensation. We start with a free consultation where you can share your experience, and we’ll explain how the legal process works and what we’ve learned from representing others in similar situations.

If your case moves forward, we focus on three main goals: gathering the medical evidence that tells your story, connecting you with experts who understand ototoxic injuries, and building a claim that reflects the full impact hearing loss has had on your life.

Building Your Medical Record

We obtain your hearing tests, Tepezza infusion records, ENT evaluations, and treatment documentation. This creates a clear timeline showing what your hearing was like before treatment, what happened during and after your infusions, and what interventions you’ve needed.

Working With Medical Experts

We consult with audiologists and otolaryngologists who can review your specific case, interpret your test results, and explain to the court how Tepezza caused your hearing damage. These experts help translate complex medical information into clear testimony.

Filing and Litigation

Once we’ve built a strong foundation, we file your claim in MDL 3079 alongside others pursuing justice from Horizon Therapeutics and Amgen. We manage all legal communications and court proceedings, so you’re never put in the position of dealing directly with pharmaceutical company lawyers.

While most mass tort cases reach settlements, we prepare every case as if it will go to trial. You’ll stay informed throughout, with direct access to our team whenever questions arise.

Latest Tepezza MDL Updates and Timeline

MDL 3079 continues to progress as more cases are filed and the court manages pretrial proceedings. As of early November 2025, approximately 272 cases have been consolidated, and the court has held regular status conferences to establish discovery schedules, expert witness deadlines, and case management protocols.

Key developments include:

• Discovery proceedings requiring Horizon Therapeutics and Amgen to produce documents about their knowledge of hearing risks, clinical trial data, and marketing practices
• Expert witness preparation as both sides line up audiologists, otolaryngologists, and pharmacologists to testify
• Bellwether trial planning, though specific trial dates have not yet been set
• Settlement discussions may occur as discovery reveals more about what the company knew and when

If you’re considering filing a claim, time is critical. Statutes of limitations vary by state, and gathering medical evidence becomes more difficult as time passes. Some patients might benefit from additional hearing testing to document the extent of their injuries.

FAQ About Tepezza Hearing Loss Lawsuits

Contact Ferrer Poirot Feller for a Free Case Evaluation

If you developed hearing loss, tinnitus, or other hearing problems after receiving Tepezza infusions for thyroid eye disease, you may have the right to hold Horizon Therapeutics and Amgen accountable.

At Ferrer Poirot Feller, we represent people across the country who’ve been harmed by pharmaceutical products they trusted. We offer free, no-obligation consultations, where you can speak directly with our team, ask questions, and gain a clear understanding of your legal options.

We know how devastating hearing damage can be, especially when you were trying to preserve your vision and quality of life. Call us today at (214) 521-4412 to schedule your free case evaluation. Your fight is our fight.

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