Skip To Main Content

How do I inject ENSPRYNG®?

Discover some helpful tips to help you self-administer ENSPRYNG

You or your caregiver will have to be trained and approved by your healthcare provider before injecting ENSPRYNG. Once you or your caregiver have your healthcare provider's permission, along with the Instructions for Use, you can use the overview guide below.

The idea of self-injecting can be intimidating at first. If you’re new to it, or just want a refresher, we’ll walk you through an overview of the process. This information does not take the place of talking to your healthcare provider about your medical condition or treatment. Talk to your healthcare provider if you have any questions.

Step 1

Take the box containing your ENSPRYNG syringe out of the refrigerator, where it was stored at 36°F to 47°F (2°C to 8°C).

Always check that you have the right medicine and dose that your healthcare provider prescribed.

Check the expiration date on the back of the box and the seal on the front of the box. If the date has passed or the seal is broken, do not use.

Dispose of the syringe per the Instructions for Use and contact your healthcare provider.


Step 2

Open the box. Gently lift the syringe by the barrel and pull it out.

Check the expiration date on the syringe. The liquid should be clear and colorless to pale yellow. Some small bubbles are normal.

If the syringe is damaged or expired, or the liquid is cloudy, discolored, or has particles in it, do not use.


Step 3

Place the syringe on a clean, flat surface, set a timer for 30 minutes and let it come to room temperature. Keep it away from heating sources; do not warm up the syringe in direct sunlight, in a microwave, or with hot water. Do not remove the needle cover while the syringe is reaching room temperature.


Step 4

While you wait, you can gather the supplies you need for the injection: 1 alcohol pad, 1 sterile cotton ball or gauze, 1 small bandage, and 1 FDA-cleared or puncture-resistant sharps container for safe disposal of the needle cap and used syringe.

Step 5

First, wash your hands with soap and water.

Next, choose an injection site on your body: the front or middle of your thighs, or the lower part of your stomach.

Do not inject into moles, scars, bruises or areas where the skin is tender, red, hard or broken. The site should not be within 2 inches of your belly button.

Where you inject must be at least 1 inch away from where you last injected.

Wipe the injection site with an alcohol pad. Let it air dry, and do not touch it, or fan or blow on the area.

If you need help with the injection, ask your trained caregiver to assist you.


Step 6

Do not take the needle cap off until you are ready to inject ENSPRYNG.

When ready, take the cap off the needle and immediately dispose of it in an FDA-approved sharps disposal container. Do not put the needle cap back on after it has been removed as this may damage the needle.

Hold the barrel of the syringe using your thumb and index finger.

Use the syringe within 5 minutes, or the needle may clog. Do not touch the needle or let it touch any surfaces. Keep it away from children.

To check for air bubbles, hold the syringe with the needle pointing up. If there are any air bubbles, gently tap the syringe with your finger until the bubbles rise to the top. Slowly push the plunger rod just until all air is expelled from the syringe and needle, and a drop of drug solution is seen at the needle tip


Step 7

Hold the barrel of the syringe using your thumb and index finger. Do not insert the needle through clothing. With your other hand, pinch the area of the skin you have cleaned. Use a quick, dart-like motion to insert the needle at an angle between 45 to 90 degrees. Do it just once. Do not change the angle of the injection.


Step 8

Let go of the pinched skin. Then slowly inject the medicine by gently pushing the plunger all the way down. Gently release the plunger and allow the needle to come out of the skin at the same angle it was inserted. The needle shield should now cover the needle. If not, take extra care when disposing.


Step 9

Check the injection site. A small amount of blood or a drop of medicine may appear. You can press a cotton ball or gauze on it, but do not rub it. If needed, you can cover it with a small bandage. If the medicine comes in contact with your skin, wash with water.

That’s it. You did it. Now all you have to do is clean up.

Step 10

Immediately place the used ENSPRYNG syringe in an FDA-approved sharps disposal container, per the Instructions for Use.

If an FDA-cleared container isn't available, use a household container that is:

  • Heavy-duty plastic and leak-resistant
  • Upright and stable during use
  • Securely sealed with a tight, puncture-resistant lid
  • Clearly labeled as hazardous waste

Over time the container will fill up, so make sure you dispose of the container as instructed by your healthcare provider pharmacist, or community guidelines.

Never recycle your container, and only place it in household trash if explicitly allowed by local rules. Visit fda.gov/safesharpsdisposal for state-specific regulations and safety information

If you have any questions about self-injecting with ENSPRYNG, call: 844-677-7964. If you have any issues with your medication, please talk with your healthcare provider.


Tips for staying on track with treatment

Icon - Injection diary
Keep an injection diary

It's important to keep up with your ENSPRYNG injections. Writing down the date and site (eg, left abdomen or right thigh) of each dose can help, since you'll need to rotate injection sites. You can also make note of any reactions to discuss with your doctor.

Icon - Monthly reminders
Add monthly reminders

When you reach the maintenance phase of your dosing schedule, having 4 weeks between each dose of ENSPRYNG gives you a lot of time to get distracted by life. Adding reminders on your phone and/or calendar about your upcoming injection days can make it easier to plan ahead for them.

Icon - Guide

We want to support your journey

Explore our Pocket Injection Guide for helpful information about ENSPRYNG.

Important Safety Information & Indication

What is ENSPRYNG® (satralizumab-mwge)?

ENSPRYNG is a prescription medicine used to treat:

  • thyroid eye disease (TED) no matter how severe it is or how long a person has had it.

It is not known if ENSPRYNG is safe and effective in children.

Who should not receive ENSPRYNG?

Do not take ENSPRYNG if you:

  • are allergic to ENSPRYNG or any of the ingredients in ENSPRYNG.
  • have an active hepatitis B infection.
  • have active or untreated inactive (latent) tuberculosis.
What is the most important information I should know about ENSPRYNG?

ENSPRYNG may cause serious side effects including:

  • Infections. ENSPRYNG can increase your risk of serious infections, some of which can be life-threatening. Talk to your healthcare provider if you are being treated for an infection, or call them right away if you think you have signs of an infection, with or without a fever, such as:
    • chills, feeling tired, muscle aches, cough that will not go away or a sore throat
    • skin redness, swelling, tenderness, pain or sores on your body
    • diarrhea, belly pain, or feeling sick
    • burning when you urinate or urinating more often than usual
  • Your healthcare provider will check if you have an infection and treat it if needed before you start or continue to take ENSPRYNG.
  • Your healthcare provider should test you for hepatitis and tuberculosis (TB) before you start taking ENSPRYNG.
  • All required vaccinations should be completed before starting ENSPRYNG. People using ENSPRYNG should not be given ‘live’ or ‘live-attenuated’ vaccines. ‘Live’ or ‘live-attenuated’ vaccines should be given at least 4 weeks before you start ENSPRYNG. Your healthcare provider may recommend that you get a ‘non-live’ (inactivated) vaccine, such as some of the seasonal flu vaccines. If you plan to get a ‘non-live’ (inactivated) vaccine, it should be given, whenever possible, at least 2 weeks before you start ENSPRYNG.
  • Increased liver enzymes.
    Your healthcare provider should order blood tests to check your liver enzymes before and while you are taking ENSPRYNG. Your healthcare provider will tell you how often you will need to have these blood tests. Make sure you get all of your follow-up blood tests as ordered by your healthcare provider. Your healthcare provider will tell you if you need to wait to start ENSPRYNG if your liver enzymes are increased.
  • Low neutrophil count.
    ENSPRYNG can cause a decrease in your neutrophil counts in your blood. Neutrophils are white blood cells that help the body fight off bacterial infections. Your healthcare provider should order blood tests to check your neutrophil count while you are taking ENSPRYNG.
  • Serious allergic reactions.
    Serious allergic reactions that may be life-threatening have happened with other medicines like ENSPRYNG. Tell your healthcare provider before taking your next dose if you had hives, rash, or flushing after your injection. Seek medical attention right away if you have any symptoms of a serious allergic reaction, such as:
    • shortness of breath or trouble breathing
    • dizziness or feeling faint
    • swelling of your lips, face, or tongue
    • moderate or severe stomach (abdominal) pain or vomiting
    • chest pain    

Before you take ENSPRYNG, tell your healthcare provider about all of your medical conditions, including if you:

  • have or think you have an infection. See "What is the most important information I should know about ENSPRYNG?"
  • have liver problems.
  • have ever had hepatitis B or are a carrier of the hepatitis B virus.
  • have had or have been in contact with someone with tuberculosis.
  • have had a recent vaccination or are scheduled to receive any vaccination.
  • are pregnant, think that you might be pregnant, or plan to become pregnant. It is not known if ENSPRYNG will harm your unborn baby.
  • are breastfeeding or plan to breastfeed. It is not known if ENSPRYNG passes into your breast milk. Talk to your healthcare provider about the best way to feed your baby if you take ENSPRYNG.

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

What are the most common side effects of ENSPRYNG?
The most common side effects of ENSPRYNG include:

  • sore throat, runny nose (nasopharyngitis)
  • rash
  • fatigue
  • extremity pain
  • headache
  • upper respiratory tract infection
  • nausea
  • inflammation of the stomach lining (gastritis)
  • joint pain (arthralgia)

These are not all the possible side effects of ENSPRYNG.

Call your doctor for medical advice about side effects.
You may report side effects to FDA at 1-800-FDA-1088. You may also report side effects to Genentech at 1-888-835-2555.

For more information, call 1-844-NSPRYNG.

For additional safety information, please see the full Prescribing Information and Medication Guide.

+