Tepezza Class Action Lawsuit Update 2025 – Hearing Damage Claims and Legal Options

Today, we talk about the Tepezza Class Action Lawsuit. You may think of it as a lawsuit against Horizon Therapeutics. However, that is quite the misconception. Legally, it is not a class action now. Rather, it is a Multidistrict Litigation, or MDL. There is a bit of difference because of that to the patients and potential claimants.

A class action is a device that enables and combines multiple individual claims into one cause of action. A small, representative number of plaintiffs represents a much larger, sometimes enormous, “class” of similarly damaged people. 

Thus, the court resolves the case on behalf of the entire class, with any settlement or judgment applying to each class member in the same way. 

Multidistrict litigation is different. It takes hundreds or thousands of like individual federal actions and puts them all into one court, in this case, the Tepezza MDL 3079 in the Northern District of Illinois.

These individual cases are combined for pre-trial discovery only. The consolidation promotes efficiency and reduces time and resources spent on all cases. However, these cases revert to being individual ones after initial evidence gathering and bellwether trials, meaning compensation is strictly based on a patient’s particular injury.

Most product liability cases, like the Tepezza Class Action Lawsuit, move through the MDL process because their individual damages are so very different.

Why Does The Term Tepezza Class Action Lawsuit Persist?

The popularity of the phrase Tepezza Class Action Lawsuit stems from the conceptual grouping it gives to many similar claims under one name. It’s an umbrella term for the growing collection of individual cases alleging hearing damage from the drug Tepezza. 

The Tepezza Class Action Lawsuit provides proper legal framework applicable to the case is.

What Is Tepezza (Teprotumumab), And What Is It Approved For?

Tepezza is used through injection to treat Thyroid Eye Disease. Another name for it is Graves’ ophthalmopathy. It is the inflammation of the muscles and fatty tissues behind the eye.

Thus, this means pain, double vision, and discomfort in the eyes and bulging for individuals. 

Tepezza got approval from the U.S. Food and Drug Administration in early 2020. The condition is found in about 200,000 people, making it a rare one. Thus, the drug is also an “orphan drug”. 

One course of treatment has eight infusions over a period of five months.

Allegations Against Horizon Therapeutics

The Tepezza Class Action Lawsuit-or rather, the hundreds of individual lawsuits-make some very serious allegations against the manufacturer, Horizon Therapeutics. Specifically, claimants contend the company failed to warn patients and doctors that the medication carried the risk of permanent hearing loss.

The key claims of the MDL are as follows:

Failure To Warn

The core allegation would appear to be that the company knew or should have known of the serious risk of ototoxicity, yet failed to warn patients and prescribing physicians adequately.

Delayed Label Update

The lawsuits cite early clinical trials that showed a risk. In July 2023, the FDA required Horizon Therapeutics to strengthen the warning for Tepezza. Manufacturers added a black box warning about hearing loss and tinnitus to the drug’s label [DrugWatch.com]. Claimants say this warning came too late to help them avoid unnecessary injuries.

Negligent Marketing

Some cases have held that the firm minimized the severity and permanency of any potential hazards to hearing.

The legal foundation of the Horizon Therapeutics Tepezza hearing damage lawsuit encompasses product liability wherein the following specific claims are being filed by the plaintiffs: design defect, strict liability, and negligence regarding failure to warn.

Read Also: Trajector Medical Lawsuit: Grievances, Legal Problems, And Veteran Testimonies

Hearing Damages And Scientific Evidence

The injuries alleged in the Tepezza Class Action Lawsuit are serious and life-altering. The primary injuries involve the structures of the inner ear.

Medical Injuries Associated With Teprotumumab

Patients in the MDL report a variety of audiological injuries that result from Tepezza treatment.

These include:

• Hearing Loss: This can be partial or, in some unfortunate cases, severe and permanent.
• Tinnitus: This is the ringing, buzzing, or hissing that occurs continuously in the ears.
• Hyperacusis: An abnormal sensitivity to everyday sounds.
• Eustachian Tube Dysfunction: Dysfunctions of middle-ear pressure equalization.

Clinical Trials Versus Real-World Risk

Early phase trials of Teprotumumab reported a hearing issue rate of approximately 10% of participants. However,  subsequent studies have shown a considerably higher rate in routine clinical care.

In one study, as many as 65% of patients treated with Tepezza reported some kind of hearing-related side effect. (Medical Journal Source)

The lopsided discrepancy in trial data and patient reports is fueling the litigation and urgency of Tepezza Class Action Lawsuit filings.

This understanding of the linkage between Teprotumumab side effects and hearing loss has been very important in the legal process.

Monitoring Is Key

Given the potential for permanent hearing damage, routine audiological surveillance is highly recommended. In fact, medical best practice would include obtaining a baseline audiogram prior to initiating treatment with Tepezza.

Regular follow-up audiograms at scheduled intervals during the course of infusion are also recommended. Failure to warn in a timely and comprehensible manner meant that patients were often not monitored appropriately to prevent permanent damage.

Status Of Tepezza Litigation – 2025 Update

The Tepezza Class Action Lawsuit MDL is well underway. There are over 300 individual lawsuits still pending in the MDL, as of late 2025, consolidated in the Northern District of Illinois. The court has set some key milestones for expert discovery, and bellwether trials could begin as early as 2026.

Bellwether trials are very important, since they are representative, small groups of people who undergo a full trial process. The early trials will help both sides, the plaintiffs’ attorneys and Horizon Therapeutics, get an idea of what the probable jury response to the evidence and the arguments presented will be.

Results from such bellwether trials are often indicative of which direction the mass settlements of the remaining cases in the MDL go. Indeed, the selection and preparation of initial test cases is what Tepezza Legal Update 2025 has been focusing on recently.

Eligibility and Actions to be Taken Now

If you have received Tepezza infusions, you could be entitled to join the Tepezza Class Action Lawsuit MDL if you developed any problems with your hearing afterward.

Who Is Eligible For The Tepezza Class Action Lawsuit?

While the criteria may vary from one law firm to another, general eligibility generally includes:

1. Diagnosis

Your diagnosis is Thyroid Eye Disease, or TED.

2. Treatment

You received one or more infusions of Tepezza.

3. Injury

You suffered a subsequent hearing injury, including permanent hearing loss, tinnitus, or other inner ear dysfunction.

4. Evidence

Any loss in hearing must be medically authenticated.

Initial Steps For Claimants

What should you do if you think Tepezza may have caused your hearing damage?

Here are some steps you can take immediately:

1. Secure Medical Records

Collect all documentation of your Tepezza infusions, including the date and dosage, along with any audiology reports or hearing tests before, during, and after treatment.

2. Journal Symptoms

Keep a day-to-day symptom journal. Note the date when your hearing problem started, how serious it was, and how it has affected your daily life.

3. Contact An Attorney

Consult an attorney experienced in pharmaceutical product liability and MDL litigation immediately, as there are time limitations to file your claim known as Statutes of Limitations.

Important Questions To Ask Your Attorney:

Ask an attorney these three critical questions:

• How is the Tepezza Class Action Lawsuit different from an MDL, and what does that mean for my case?
• What are the out-of-pocket expenses I pay, and how is your firm compensated?
• From your experience, how would you estimate a realistic timeline for this kind of complex litigation?

What Compensation Might Be Available?

The goal of the Tepezza Class Action Lawsuit is to recover all damages sustained. Given that these are individual actions that have been part of an MDL, compensation can vary greatly based on the severity of the injury to the patient.

The forms of damages that may be available to an injured person include, but are not limited to:

1. Medical Expenses

Past and future costs of hearing aids, cochlear implants, doctor visits, and audiology appointments.

2. Lost Income

Wages that are lost because of inability to work or early retirement due to a hearing disability.

3. Pain and Suffering

Damages for physical pain, emotional distress, and loss of enjoyment of life.

4. Punitive Damages

These may be awarded in certain jurisdictions if Horizon Therapeutics acted with willful or reckless disregard for patient safety.

The value of a given claim will vary with the severity and permanence of the hearing loss, the age, and professional life of the patient, and the strength of the causation evidence that links Tepezza to the injury. 

Read Also: Johnson and Johnson Lawsuit: A Perfect Example of Mesothelioma Case

Expert Advice – Best Practices for Patients

Whether one pursues the Tepezza Class Action Lawsuit or not, proactive health monitoring should always be at the forefront for Tepezza patients and anyone considering it.

Alternatives Discussion

Have an open and frank discussion with your doctor regarding the risks versus the benefits of Tepezza. Consider asking what other treatment options exist for TED.

Demand Monitoring

Make sure you receive a baseline audiogram before the start of the first infusion; then, follow with regular audiological monitoring throughout the course of treatment.

Record Keeping

Keep an accurate and complete record of all your medical information. This should include the dates of treatment and all your audiogram results.

Frequently Asked Questions (FAQs):

Filing a claim is a serious decision. You should consult with an experienced attorney about how the status of an MDL presently applies to your particular injury and individual circumstances. We compiled the top three questions patients ask about the litigation.