Tepezza, a widely prescribed drug for treating thyroid eye disease (TED), has helped many patients reduce eye bulging and double vision—but it’s also come under legal fire for its unexpected and potentially irreversible hearing-related side effects.
If you or a loved one used Tepezza and developed hearing loss, tinnitus, or related complications, you may be entitled to financial compensation through an ongoing mass tort lawsuit.
This guide explains who qualifies for a Tepezza hearing loss claim in 2025, what side effects are involved, and how to take legal action.
What Is Tepezza?
Tepezza (teprotumumab-trbw) is an FDA-approved biologic drug manufactured by Horizon Therapeutics (now owned by Amgen). It was introduced in 2020 as the first and only treatment for Thyroid Eye Disease, an autoimmune condition where the eye muscles and tissues become inflamed, often causing bulging eyes and double vision.
While it has shown effectiveness in reducing TED symptoms, post-market reports and research studies have uncovered a serious problem—ototoxicity, or hearing-related damage.
What Hearing Problems Are Linked to Tepezza?
A growing number of patients who received Tepezza infusions report experiencing:
- Hearing loss (partial or total)
- Tinnitus (ringing or buzzing in the ears)
- Autophony (hearing your own voice unusually loud)
- Ear pressure or fullness
- Sensitivity to sound
- Distorted or muffled hearing
Many of these symptoms have appeared within a few doses of the medication, and in some cases, the hearing loss has been permanent.
What Do the Lawsuits Claim?
Legal complaints against Horizon/Amgen allege that:
- The company failed to warn patients and doctors about the risks of hearing loss.
- Horizon was aware—or should have been aware—of ototoxicity risks from early trials and post-market reports.
- Patients were not provided with the opportunity to monitor or mitigate these risks before irreversible damage occurred.
- The label update adding hearing loss as a side effect came too late for thousands already exposed.
As a result, individuals who experienced hearing-related injuries are seeking damages for medical costs, permanent impairment, and emotional distress.
Who Qualifies for a Tepezza Lawsuit in 2025?
You may qualify for a lawsuit if:
✅ You received at least one Tepezza infusion
The drug is typically administered via IV every three weeks, for a total of 4 to 8 doses.
✅ You experienced hearing problems
This includes:
- Diagnosed hearing loss (confirmed by audiologist or ENT)
- Tinnitus
- Muffled or distorted hearing
- Symptoms starting during or shortly after treatment
✅ Your symptoms persisted for weeks or became permanent
Some patients experience temporary side effects, but many lawsuits focus on long-lasting or irreversible damage.
✅ You had no prior history of severe hearing loss
Having a clean audiological history prior to using Tepezza strengthens your claim, especially if hearing issues appeared suddenly after treatment.
✅ You were not adequately warned
If your doctor did not inform you about the risks of hearing damage, or you were not offered pre-treatment hearing screening, this may increase liability.
What Evidence Strengthens a Tepezza Claim?
Your case will be stronger if you have the following:
- Medical records showing dates of Tepezza infusions
- Audiologist reports or hearing exams before and after treatment
- ENT physician notes documenting tinnitus or other hearing issues
- Proof of impact on daily life (e.g., difficulty working, social withdrawal, use of hearing aids)
- Communications with your doctor that show you weren’t informed of risks
You do not need to have filed a prior complaint or recall notice to qualify.
What If You Had Only Mild Hearing Loss?
Even if your symptoms were not severe or permanent, you may still have a valid claim. Plaintiffs are seeking damages for:
- Discomfort and distress
- Medical expenses (hearing tests, consultations, hearing aids)
- Missed work or reduced income
- Loss of enjoyment in life
Your attorney can help evaluate the full impact of your injury—even if it seems minor now.
FDA and Medical Research on Tepezza and Hearing Loss
In 2021, a study published in the Endocrine Society Journal found that up to 65% of Tepezza users experienced some form of hearing issue.
In July 2023, the FDA updated Tepezza’s warning label to include hearing loss and tinnitus as known side effects. Unfortunately, this change came after thousands of patients had already been treated, many of whom say they were not warned.
What Compensation Could Victims Receive?
While no global settlement has been announced yet, early estimates based on similar mass torts suggest that compensation could cover:
| Category | Examples |
|---|---|
| Medical Expenses | Hearing tests, ENT consultations, hearing aids, therapy |
| Pain and Suffering | Emotional trauma, embarrassment, lifestyle impact |
| Lost Wages | Missed work or demotion due to hearing difficulties |
| Permanent Disability | In cases of total or long-term hearing loss |
| Punitive Damages | If proven the manufacturer acted with gross negligence |
Compensation will vary case by case, depending on documentation and injury severity.
How to File a Tepezza Hearing Loss Lawsuit
Step 1: Contact a Mass Tort Attorney
Choose a firm experienced in pharmaceutical litigation and ototoxicity claims. Most offer free consultations and work on contingency, meaning no upfront cost.
Step 2: Gather Your Medical Documentation
Your attorney will help request infusion dates, ENT evaluations, hearing exams, and treatment records.
Step 3: File Your Claim
Your case may be added to a growing pool of federal lawsuits forming a multidistrict litigation (MDL) for Tepezza-related hearing injuries.
Step 4: Follow Up and Prepare for Discovery
In some cases, you may be asked to provide testimony, written answers, or expert evaluation.
Is There a Deadline to File?
Yes. Each state has a statute of limitations, generally 2 to 3 years from when you first discovered the injury. Because Tepezza was only released in 2020, most users still fall within the eligibility window—but it’s important to act quickly.
Filing after the deadline may result in your case being dismissed entirely.
Final Thoughts
If you trusted Tepezza to treat your thyroid eye disease and were left with permanent or distressing hearing damage, you are not alone. Patients across the U.S. are seeking justice and financial relief for a side effect that should have been disclosed sooner.
With lawsuits progressing in 2025, the time to act is now. Consulting with a qualified attorney can help you protect your legal rights and get the compensation you deserve.