How TZIELD is given

Everything to know about the TZIELD infusion process

A doctor speaking to her patient

TZIELD is a single, 14-day course of treatment

An IV fluid bag

Given as an intravenous (IV) infusion

This means it's given through a needle into a vein in the arm

A calendar

Once a day for 14 days

Infusions are administered by a healthcare team.* TZIELD COMPASS will check in throughout treatment to ensure a seamless experience

A stopwatch

At least 30 minutes per infusion

Plus additional time before and after infusion for preparation and monitoring

*If a scheduled infusion is missed, a doctor will continue the treatment on the next scheduled day. You will not receive 2 infusions on the same day.

You have options for where and how to infuse

When it comes to location, be sure to share your preferences with your doctor, but note that some insurance plans do not cover all sites of care. Your doctor can also help you determine the best method of infusion for you or your loved one.

Work with your doctor to determine:

Your site of care

A hospital
At an infusion center or doctor’s office

A home
At home

Two arrows crossing in the middle
A hybrid of both options

Your method of infusion

An injector needle
Daily IV infusion
View definition

A catheter
Midline catheter
View definition

A catheter
Peripherally inserted central catheter (PICC)
View definition
A checklist and a writing utensil
Download the Site of Care Guide to learn more about your location options.

TZIELD infusion process

Select a tab to learn about each step

Before infusion

Prep with yourhealthcare team:
  • Talk with your doctor about which site of care option and infusion method is right for you or your loved one
  • Discuss the timing of any recent or upcoming vaccinations with your doctor, as treatment with TZIELD may impact how well they work
  • Confirm the dates, times, and locations of the infusions and discuss any additional questions you have

Connect with TZIELD COMPASS, who can:
  • Help with infusion scheduling and coordinating travel logistics if needed
  • Provide education and practical support for the infusion process
  • Help connect you with a TZIELD Mentor if you're feeling nervous and want to talk to someone who's been through treatment

Discuss lab work and pre-infusion medications
  • Your doctor will order blood tests for you or your loved one to measure baseline liver function and complete blood counts
  • If infusing at home, you may have to travel to a lab of your choice to complete lab work
  • Your doctor may also have you or your loved one take oral medications for the first 5 days of infusion to help reduce potential side effects. These medicines include painkillers, antihistamines, and anti-nausea medication.

During infusion

Step 1

It's important to make sure you or your loved one are feeling well before beginning the infusion. A member of the healthcare team will check vitals, including temperature and blood pressure, and may also do a quick blood draw to check liver function and complete blood counts.

Step 2

The TZIELD dose is personalized based on height and weight and will gradually increase over the first 5 days to help the body adjust. The healthcare team will give you or your loved one oral medications to help reduce potential side effects. These could include certain types of painkillers, antihistamines, and anti-nausea medication.

Step 3

Your healthcare team will then prepare the medicine and start the infusion. During treatment, they will check for serious side effects, as well as other side effects, and treat you as needed. Your healthcare team may temporarily or completely stop your treatment with TZIELD, if you develop liver problems, have a serious infection, or if your blood counts stay too low.* Remember, if anything feels off or different to you or your loved one, let your healthcare team know—they're there to help.

Step 4

After the infusion is finished, the healthcare team will remove the IV or disconnect the midline or PICC line. You can expect a period of monitoring after the infusion to ensure there are no reactions, and then you'll be free to leave. You or your loved one should be able to continue the day like normal, as advised by your doctor.

*For those who experience a decrease in white blood cell counts, levels typically begin to recover after the 5th day of treatment and return to pre-treatment levels within 2 weeks of completing infusions.


After infusion

Discuss with your doctor
  • Your doctor will discuss the right post-treatment monitoring and care plan for you or your loved one.
  • Talk to your doctor or healthcare team about resuming activities post-treatment
  • Schedule regular check-ins with your doctor to keep track of your or your loved one's health over time

Monitoring type 1 diabetes (T1D) going forward

It’s important to know and watch for early signs or symptoms of T1D (like increased thirst, frequent urination, or more tiredness than normal) and talk to your healthcare team about any changes you or your loved one experience.

Your doctor may recommend periodic lab tests or tools like glucose monitoring to help keep an eye on your or your loved one's blood sugar levels and to monitor for diabetic ketoacidosis (DKA), a medical emergency that can happen when T1D progresses in which the blood becomes acidic because the body does not have enough insulin.

Before infusion

Prep with yourhealthcare team:
  • Talk with your doctor about which site of care option and infusion method is right for you or your loved one
  • Discuss the timing of any recent or upcoming vaccinations with your doctor, as treatment with TZIELD may impact how well they work
  • Confirm the dates, times, and locations of the infusions and discuss any additional questions you have

Connect with TZIELD COMPASS, who can:
  • Help with infusion scheduling and coordinating travel logistics if needed
  • Provide education and practical support for the infusion process
  • Help connect you with a TZIELD Mentor if you're feeling nervous and want to talk to someone who's been through treatment

Discuss lab work and pre-infusion medications
  • Your doctor will order blood tests for you or your loved one to measure baseline liver function and complete blood counts
  • If infusing at home, you may have to travel to a lab of your choice to complete lab work
  • Your doctor may also have you or your loved one take oral medications for the first 5 days of infusion to help reduce potential side effects. These medicines include painkillers, antihistamines, and anti-nausea medication.

Download
Download the Infusion Guide to learn more about what to expect when treating with TZIELD

Make the most of your infusion experience

Explore helpful infusion tips below

00:14 - Introduction

00:49 - How did you balance daily life during your 2-week infusion journey?

01:48 - What was your experience with side effects like during treatment?

03:17 - How did your healthcare team support you during your infusion journey?

04:18 - What resources would you recommend to patients just getting started?

05:23 - What would you tell someone who is nervous about starting TZIELD?

07:06 - What is TZIELD?

07:44 - Important Safety Information

What is TZIELD?

TZIELD is a prescription medicine used to delay the onset of Stage 3 type 1 diabetes, which is when your body can’t make enough insulin on its own and may require insulin injections. TZIELD is for adults and children 8 years of age and older who have Stage 2 type 1 diabetes. This means that they have tested positive for 2 or more type 1 diabetes-related autoantibodies, have abnormal blood sugar levels, and do not have type 2 diabetes.

It is not known if TZIELD is safe and effective in children under 8 years of age.

Director:
We are rolling. TZIELD, Take One.

[DISCLAIMER] Please see Important Safety Information at the conclusion of this video and full Prescribing Information/Medication Guide on this webpage.

Molly:
One thing I love about sharing our TZIELD experience is how it connects families like ours together. We can share the same experience and help those who may be in the same situation.

[DISCLAIMER] Patient stories reflect the real-life experiences of persons 8 years and older diagnosed with autoimmune type 1 diabetes (T1D) during the stage prior to insulin-dependence, also known as Stage 2 T1D, and who have been prescribed TZIELD. Individual experiences may vary. Patient stories are not necessarily representative of what another person receiving TZIELD may experience.

Katie:
We are all TZIELD Ambassadors sponsored by Sanofi and we're here to share our infusion stories.

[DISCLAIMER] The people in this video are TZIELD Patient Ambassadors.

Katie:
Having my infusions done in home was a wonderful choice for me because I was still able to take my kids to the bus in the morning, be there when they got off the bus. I didn't have to put my life on hold for two weeks and I was even able to do some of the things I really love doing, like baking and working out, and so that worked the best for me.

William:
Yeah, life pretty much went on like normal for me too. I had my infusions offsite and so I spent two weeks in clinic and did schoolwork remotely and after I finished my infusions, I went back to school and went back to running like normal.

Zivile:
So my son Rimvydas also got his infusions when he was also in school and we took the hybrid approach, and we set that up with our care team. So we did one week in the hospital and then the second week we had two nurses come to our house and we did the infusions there. So we kind of got the best of both worlds that way.

Molly:
It’s just new, it's scary. And then being able to go over the possible side effects and see that it's, it's things that can possibly be controlled upfront or um, be given something throughout to help manage and get through. I actually ended up wanting to wait a few days before we started to infuse because all of the what-ifs for the possible side effects, um, really started to hit home for me and knowing that her care team would be monitoring throughout each infusion to take care of those, those types symptoms made me feel a lot better.

[DISCLAIMER] These answers are based on individual patient experiences. Results may vary from patient to patient.

[DISCLAIMER] For the first 5 days of treatment, your healthcare provider will give you medication by mouth before starting your TZIELD infusion. These medicines include ibuprofen, naproxen, or other pain relievers such as acetaminophen, an antihistamine, and an anti-nausea medicine.

William:
My only side effect from TZIELD was tiredness, and it was either because Mom and I were staying up late watching Friends or partially due to the antihistamine.

[DISCLAIMER] These medicines may help reduce symptoms of cytokine release syndrome (CRS) such as fever, headache, muscle and joint pain, or nausea.

Molly:
That's Aubri, too. She was just tired the whole time. She slept during her first infusion.

[DISCLAIMER] The most common side effects of TZIELD include rash, decrease in white blood cell counts, and headache. TZIELD may cause cytokine release syndrome and a decrease in your white blood cell counts, which can be serious. TZIELD may cause tiredness.

Katie:
Yeah, that was definitely the worst part for me too, was just feeling tired, you know, from the antihistamine. Other than the tiredness, I mostly just experienced nausea day four and five, which was more annoying than anything and my nurse, you know, took care of that with the, uh, anti-nausea medication.

[DISCLAIMER] Tell your doctor right away if you develop fever, nausea, tiredness, headache, rash, or muscle and joint pain, or are planning any vaccines as TZIELD may affect how well they work.

Zivile:
Yeah, so for my son, um, he had a rash and a headache and he also had, um, low blood cell counts, but our healthcare team reassured us that these were common side effects of treatment and that they would resolve over time, and they did.

[DISCLAIMER] For those who experience a decrease in white blood cell counts, these levels typically begin to recover after the 5th day of treatment and returned to pre-treatment levels within 2 weeks of completing infusions.

Amanda:
For our family, the healthcare team was a great source of support. They were constantly checking on us, you know, looking out for rashes and any of those other potential side effects. I felt like they really knew their stuff and they were very caring and attentive to his needs.

William:
Yeah, definitely. By the end of the treatment process, I, my endocrinologist and the healthcare team were basically family and knew them on a level that was not expecting to know them on.

Molly:
Aubri loved her healthcare team as well. It definitely made us feel like we weren't just a number. By the end of it, she was so comfortable with everyone. She was most excited to see her lab lady every day.

William:
Not Mom? What do you mean?

Molly:
No, not me. <laugh> Not mom at all.

Aubri:
I really liked her. She helped me get through my fear of needles and she made me feel like I wasn't alone and she was here and that I was okay.

Katie:
Yeah, they make you feel really comfortable.

Molly:
It was like family by the end.

Amanda:
Our family felt very supported by the TZIELD COMPASS Patient Support Program. Our TZIELD COMPASS Navigator was in frequent communication with us from the very beginning. We discussed insurance questions, educational questions. It was a great opportunity to just have that TZIELD COMPASS Navigator helping us along the way.

William:
Since the infusion center wasn't in our hometown, the TZIELD COMPASS Navigator helped us with the travel logistics and figure out a hotel and all the information about the infusions.

Amanda:
I really appreciated how they helped our family even after the process. With reimbursement, insurance questions. It was a great asset to have in our corner.

Katie:
Yeah, I would agree with that. I mean, I wasn't nervous because there was so much support around this. I mean, they said, you know, we'll get the process started and you can change your mind at any time and, um, and answer any questions I might have, so it was a really great resource.

Molly:
I would tell someone that it's okay to be nervous. It's okay to have questions. It's okay to be afraid. Those are all real feelings that I think all of us have experienced.

[DISCLAIMER] Individual results may vary. There is no evidence to suggest that TZIELD will have any effect on burden of disease, outcomes, quality of life, or life expectancy.

Aubri:
I would tell them that I was scared too and I didn't know what was gonna happen. I would say it's like worth it and I'm just glad I've been able to take it because I'm able to live life and be a teenager.

Zivile:
I'm not gonna lie, I was pretty worried before treatment began, but what really helped was that I thought, gee, other people have gotten this before him and really helped to reassure me that things were gonna be okay.

[DISCLAIMER] In a clinical study, TZIELD delayed the onset of insulin-dependent type 1 diabetes by a median* of 4 years, compared to 2 years with placebo. Individual results may vary.
*Median is the middle number in a group of numbers arranged from lowest to highest.

Katie:
I would tell them if they were nervous about starting TZIELD, that I was diagnosed in early 2023 with presymptomatic Stage 2 type 1 diabetes, and was told that I would need insulin within a year. But here it is, 2025, and I still don't need insulin.

[DISCLAIMER] The clinical trial included 76 people in the stage right before they become insulin-dependent (Stage 2 T1D). 44 received TZIELD and 32 received placebo.

William:
Once I saw the data of people that had not progressed from non-symptomatic to symptomatic needing insulin, it was enough of a reason for me to do it. There's a chance to get more time before type 1 diabetes progresses. That really made me optimistic about my future.

[DISCLAIMER] People were followed until they were diagnosed with insulin-dependent T1D (Stage 3). The median* amount of time that people were followed was 51 months (just over 4 years). People not diagnosed with insulin-dependent T1D were followed for different periods of time.

*Median is the middle number in a group of numbers arranged from lowest to highest.

Amanda:
I think sometimes health care feels very overwhelming, but it was nice to have, in addition to our healthcare team, our endocrinologist, to also have a, essentially a third party between our healthcare team, our family, and the TZIELD COMPASS Navigator, that we really felt supported and we knew what was coming.

[DISCLAIMER] There is no evidence to suggest that TZIELD will have any effect on burden of disease, outcomes, or life expectancy.

William:
Couldn't have said it any better.

Amanda:
Oh, thanks. <laugh>

AVO:
What is TZIELD?

TZIELD is a prescription medicine used to delay the onset of Stage 3 type 1 diabetes, which is when your body can’t make enough insulin on its own and may require insulin injections. TZIELD is for adults and children 8 years of age and older who have Stage 2 type 1 diabetes. This means that they have tested positive for 2 or more type 1 diabetes-related autoantibodies, have abnormal blood sugar levels, and do not have type 2 diabetes.
It is not known if TZIELD is safe and effective in children under 8 years of age.

IMPORTANT SAFETY INFORMATION

What is the most important information I should know about TZIELD?

TZIELD may cause serious side effects. These include:

  • Cytokine release syndrome (CRS). Signs and symptoms may start during the first 5 days of TZIELD treatment and could include fever, nausea, feeling tired (fatigue), headache, muscle and joint pain, or increased liver enzymes in your blood. Tell your healthcare provider right away if you develop any signs and symptoms of CRS during treatment with TZIELD
  • Decrease in white blood cells. TZIELD may cause a decrease in a type of white blood cell called lymphocytes. A decrease in white blood cells is a serious, but common side effect that can affect your body’s ability to fight infections. A decrease in white blood cell counts can happen after your first dose. Your white blood cell counts will start to go back to normal after your fifth dose of TZIELD. Some people may develop longer and more severe
Your healthcare provider will do blood tests to check your liver and your complete blood counts before you start treatment and during treatment with TZIELD. During and after your treatment with TZIELD, your healthcare provider will check for serious side effects, as well as other side effects, and treat you as needed. Your healthcare provider may temporarily or completely stop your treatment with TZIELD, if you develop liver problems, have a serious infection, or if your blood counts stay too low.

What should I tell my healthcare provider before receiving TZIELD?

Before or after receiving TZIELD, tell your healthcare provider about all your medical conditions, including if you:

  • have a serious infection or an infection that does not go away or keeps coming back
  • have recently received or are scheduled to receive an immunization (vaccine). TZIELD may affect how well a vaccine works. Tell your doctor that you are receiving TZIELD before receiving a vaccine
  • are pregnant or plan to become pregnant. TZIELD may harm your unborn baby. Do not receive TZIELD during pregnancy and at least 30 days before a planned pregnancy
  • are breastfeeding or plan to breastfeed. It is not known if TZIELD passes into your breast milk and if it can harm your baby. Talk to your healthcare provider about the best way to feed your baby if you receive TZIELD
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

What are the possible side effects of TZIELD?

The most common side effects of TZIELD include:

  • rash
  • leukopenia (decrease in white blood cell counts)
  • headache
These are not all of the possible side effects of TZIELD. Talk to your healthcare provider for more information, and tell them about any side effects you notice. You may report side effects to the FDA at www.fda.gov/medwatch or 1-800-FDA-1088.

Please see accompanying Medication Guide and Prescribing Information.

To learn more, visit www.TZIELD.com

© 2025 Sanofi. All rights reserved. MAT-US-2502814-v1.0-06/2025
Intended for U.S. residents only.

TZIELD infusion stories: real people, real experiences

Hear TZIELD patients and caregivers share their infusion stories—offering insights, reassurance, and tips on treatment.

A father with his arm wrapped around his son and both are smiling into the distance

You’re not alone

The TZIELD COMPASS Patient Support Program and the TZIELD Mentor Program are resources for care, clarity, and connection throughout the two-week infusion journey.

Important Safety Information and Approved Use

What is the most important information I should know about TZIELD? TZIELD may cause serious side effects. These include:
  • Cytokine release syndrome (CRS). Signs and symptoms may start during the first 5 days of TZIELD treatment and could include fever, nausea, feeling tired (fatigue), headache, muscle and joint pain, or increased liver enzymes in your blood. Tell your healthcare provider right away if you develop any signs and symptoms of CRS during treatment with TZIELD
  • Decrease in white blood cells. TZIELD may cause a decrease in a type of white blood cell called lymphocytes. A decrease in white blood cells is a serious, but common side effect that can affect your body’s ability to fight infections. A decrease in white blood cell counts can happen after your first dose. Your white blood cell counts will start to go back to normal after your fifth dose of TZIELD. Some people may develop longer and more severe decreases in lymphocytes

Your healthcare provider will do blood tests to check your liver and your complete blood counts before you start treatment and during treatment with TZIELD. During and after your treatment with TZIELD, your healthcare provider will check for serious side effects, as well as other side effects, and treat you as needed. Your healthcare provider may temporarily or completely stop your treatment with TZIELD, if you develop liver problems, have a serious infection, or if your blood counts stay too low.

What should I tell my healthcare provider before receiving TZIELD? Before or after receiving TZIELD, tell your healthcare provider about all your medical conditions, including if you:
  • have a serious infection or an infection that does not go away or keeps coming back
  • have recently received or are scheduled to receive an immunization (vaccine). TZIELD may affect how well a vaccine works. Tell your doctor that you are receiving TZIELD before receiving a vaccine
  • are pregnant or plan to become pregnant. TZIELD may harm your unborn baby. Do not receive TZIELD during pregnancy and at least 30 days before a planned pregnancy
  • are breastfeeding or plan to breastfeed. It is not known if TZIELD passes into your breast milk and if it can harm your baby. Talk to your healthcare provider about the best way to feed your baby if you receive TZIELD

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

What are the possible side effects of TZIELD? The most common side effects of TZIELD include:
  • rash
  • leukopenia (decrease in white blood cell counts)
  • headache

These are not all of the possible side effects of TZIELD. Talk to your healthcare provider for more information, and tell them about any side effects you notice. You may report side effects to the FDA at www.fda.gov/medwatch or 1-800-FDA-1088.

Please see Medication Guide and Prescribing Information.

What is TZIELD?

TZIELD is a prescription medicine used to delay the onset of Stage 3 type 1 diabetes, which is when your body can’t make enough insulin on its own and may require insulin injections. TZIELD is for adults and children 8 years of age and older who have Stage 2 type 1 diabetes. This means that they have tested positive for 2 or more type 1 diabetes-related autoantibodies, have abnormal blood sugar levels, and do not have type 2 diabetes.

It is not known if TZIELD is safe and effective in children under 8 years of age.

Important Safety Information and Approved Use

What is the most important information I should know about TZIELD? TZIELD may cause serious side effects. These include:
  • Cytokine release syndrome (CRS). Signs and symptoms may start during the first 5 days of TZIELD treatment and could include fever, nausea, feeling tired (fatigue), headache, muscle and joint pain, or increased liver enzymes in your blood. Tell your healthcare provider right away if you develop any signs and symptoms of CRS during treatment with TZIELD
  • Decrease in white blood cells. TZIELD may cause a decrease in a type of white blood cell called lymphocytes. A decrease in white blood cells is a serious, but common side effect that can affect your body’s ability to fight infections. A decrease in white blood cell counts can happen after your first dose. Your white blood cell counts will start to go back to normal after your fifth dose of TZIELD. Some people may develop longer and more severe decreases in lymphocytes

Your healthcare provider will do blood tests to check your liver and your complete blood counts before you start treatment and during treatment with TZIELD. During and after your treatment with TZIELD, your healthcare provider will check for serious side effects, as well as other side effects, and treat you as needed. Your healthcare provider may temporarily or completely stop your treatment with TZIELD, if you develop liver problems, have a serious infection, or if your blood counts stay too low.

What should I tell my healthcare provider before receiving TZIELD? Before or after receiving TZIELD, tell your healthcare provider about all your medical conditions, including if you:
  • have a serious infection or an infection that does not go away or keeps coming back
  • have recently received or are scheduled to receive an immunization (vaccine). TZIELD may affect how well a vaccine works. Tell your doctor that you are receiving TZIELD before receiving a vaccine
  • are pregnant or plan to become pregnant. TZIELD may harm your unborn baby. Do not receive TZIELD during pregnancy and at least 30 days before a planned pregnancy
  • are breastfeeding or plan to breastfeed. It is not known if TZIELD passes into your breast milk and if it can harm your baby. Talk to your healthcare provider about the best way to feed your baby if you receive TZIELD

Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

What are the possible side effects of TZIELD? The most common side effects of TZIELD include:
  • rash
  • leukopenia (decrease in white blood cell counts)
  • headache

These are not all of the possible side effects of TZIELD. Talk to your healthcare provider for more information, and tell them about any side effects you notice. You may report side effects to the FDA at www.fda.gov/medwatch or 1-800-FDA-1088.

Please see Medication Guide and Prescribing Information.

What is TZIELD?

TZIELD is a prescription medicine used to delay the onset of Stage 3 type 1 diabetes, which is when your body can’t make enough insulin on its own and may require insulin injections. TZIELD is for adults and children 8 years of age and older who have Stage 2 type 1 diabetes. This means that they have tested positive for 2 or more type 1 diabetes-related autoantibodies, have abnormal blood sugar levels, and do not have type 2 diabetes.

It is not known if TZIELD is safe and effective in children under 8 years of age.