What is Teplizumab: Uses, Dosage, Side Effects and More

Teplizumab is a prescription medication that helps delay the onset of type 1 diabetes in people who are at high risk of developing the condition. This immunotherapy drug works by targeting specific immune cells that would otherwise attack the insulin-producing cells in your pancreas. Think of it as a way to calm down an overactive immune system before it causes irreversible damage to your body's ability to make insulin.

What is Teplizumab?

Teplizumab is a monoclonal antibody medication designed to prevent or delay type 1 diabetes. It belongs to a class of drugs called immunosuppressants, which means it modifies how your immune system works. The medication is given through an intravenous (IV) infusion, similar to how you might receive fluids at a hospital.

This medication represents a breakthrough in diabetes prevention because it's the first FDA-approved treatment that can actually delay the onset of type 1 diabetes. The drug works by targeting CD3-positive T cells, which are immune cells that mistakenly attack your pancreas in type 1 diabetes. By temporarily reducing the activity of these cells, teplizumab helps preserve your body's remaining ability to produce insulin.

What is Teplizumab Used For?

Teplizumab is specifically used to delay the onset of stage 3 type 1 diabetes in adults and children who are 8 years or older. You might be a candidate for this treatment if you're currently in stage 2 type 1 diabetes, which means you have certain antibodies in your blood and some changes in blood sugar, but you don't yet have the full symptoms of diabetes.

Your doctor will typically recommend teplizumab if blood tests show you have two or more diabetes-related antibodies and your blood sugar levels indicate you're likely to develop type 1 diabetes within a few years. The goal is to intervene before you need daily insulin injections, giving you more time with your body's natural insulin production.

This medication is not used to treat people who already have established type 1 diabetes or type 2 diabetes. It's specifically designed for prevention in high-risk individuals who haven't yet developed the full condition.

How Does Teplizumab Work?

Teplizumab works by temporarily suppressing the part of your immune system that attacks insulin-producing cells in your pancreas. In type 1 diabetes, your immune system mistakenly identifies these healthy cells as foreign invaders and destroys them. This medication acts like a referee, stepping in to stop this harmful immune response.

The drug binds to specific immune cells called T cells and causes them to become less active or even die off temporarily. This gives your pancreas a chance to recover and continue producing insulin for a longer period. While teplizumab is considered a strong immunosuppressive medication, it's used for a relatively short treatment course, which helps minimize long-term risks.

Studies show that teplizumab can delay the onset of type 1 diabetes by an average of about 2 years, though some people may benefit for much longer. The medication essentially buys you valuable time before you need to start insulin therapy.

How Should I Take Teplizumab?

Teplizumab is given as an intravenous infusion over 30 minutes once daily for 14 consecutive days. You'll receive this treatment at a healthcare facility where medical professionals can monitor you closely. The medication cannot be taken as a pill or given as a simple injection.

Before each infusion, your healthcare team will likely give you medications to help prevent infusion reactions. These might include antihistamines, acetaminophen, or corticosteroids. You don't need to fast before treatment, but it's helpful to eat a light meal beforehand to avoid feeling lightheaded during the infusion.

During the infusion, you'll be monitored for any side effects or reactions. The healthcare team will check your vital signs regularly and watch for symptoms like fever, chills, or difficulty breathing. Most people tolerate the treatment well, but having medical professionals nearby ensures your safety throughout the process.

How Long Should I Take Teplizumab For?

The standard treatment course for teplizumab is 14 days of daily infusions. This is typically a one-time treatment course, meaning you won't need to repeat it regularly like you might with other medications. The effects of this 14-day treatment can last for years in terms of delaying diabetes onset.

After completing your treatment course, you'll need regular follow-up appointments to monitor your blood sugar levels and overall health. Your doctor will track how well the medication is working by checking your insulin production and blood glucose levels over time. These check-ups are crucial for determining if and when you might need to start other diabetes treatments.

Currently, there's no established protocol for repeating teplizumab treatment. The medication's effects can be long-lasting, and researchers are still studying whether additional courses might be beneficial for some people.

What Are the Side Effects of Teplizumab?

Like all medications, teplizumab can cause side effects, though not everyone experiences them. The most common side effects are generally manageable and often improve as your body adjusts to the treatment.

Here are the most frequently reported side effects that you might experience during or after treatment:

• Headache and fatigue
• Nausea and vomiting
• Muscle aches and joint pain
• Infusion-related reactions like fever, chills, or skin rash
• Temporary decreases in white blood cell counts
• Swollen lymph nodes

Most of these side effects are mild to moderate and resolve within a few days to weeks after treatment. Your healthcare team can provide medications to help manage symptoms like nausea or headaches if they become bothersome.

There are also some less common but more serious side effects that require immediate medical attention. These rare possibilities include severe allergic reactions, serious infections due to immune suppression, or significant changes in blood cell counts. Your medical team will monitor you closely for these potential complications.

Who Should Not Take Teplizumab?

Teplizumab isn't suitable for everyone, even among those at risk for type 1 diabetes. You should not receive this medication if you have a known allergy to teplizumab or any of its components. People with active infections or severely weakened immune systems are also not good candidates for treatment.

Your doctor will carefully evaluate your medical history before recommending teplizumab. Certain conditions make this treatment inappropriate or require special precautions:

• Active infections or history of recurrent serious infections
• Current use of other immunosuppressive medications
• Pregnancy or plans to become pregnant
• Severe kidney or liver disease
• History of certain cancers
• Recent vaccinations with live vaccines

Your healthcare provider will also consider your age, overall health status, and other medications you're taking. They'll weigh the potential benefits against the risks to determine if teplizumab is right for your specific situation.

Teplizumab Brand Name

Teplizumab is marketed under the brand name Tzield. This is the only FDA-approved formulation of teplizumab currently available in the United States. The medication is manufactured by Provention Bio and was approved by the FDA in November 2022.

When discussing this medication with your healthcare provider or pharmacist, you might hear it referred to by either name. The full technical name is teplizumab-mzwv, but most people simply call it Tzield or teplizumab.

Teplizumab Alternatives

Currently, there are no other FDA-approved medications that can delay the onset of type 1 diabetes like teplizumab can. This makes Tzield unique in the treatment landscape for diabetes prevention. However, researchers are actively studying other potential preventive treatments.

If you're not a candidate for teplizumab or it's not available to you, your doctor might discuss other approaches to managing your diabetes risk. These might include careful monitoring of your blood sugar levels, lifestyle modifications, and participation in clinical trials testing new preventive treatments.

Some people choose to focus on intensive monitoring and early intervention with insulin therapy once diabetes develops. While this doesn't prevent diabetes like teplizumab does, it can help catch the condition early and start treatment promptly.

Is Teplizumab Better Than Other Diabetes Medications?

Teplizumab serves a completely different purpose than traditional diabetes medications, so direct comparisons aren't really applicable. While medications like metformin or insulin treat existing diabetes, teplizumab aims to prevent diabetes from developing in the first place.

The medication's effectiveness should be measured against doing nothing for diabetes prevention, not against treatments for established diabetes. In clinical trials, teplizumab delayed the onset of type 1 diabetes by an average of about 2 years compared to placebo treatment.

Once you do develop type 1 diabetes, you'll still need traditional diabetes treatments like insulin. Teplizumab doesn't replace these medications but rather delays the need for them. This delay can be incredibly valuable for maintaining your quality of life and reducing the long-term complications of diabetes.