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Tegsedi (Inotersen sodium): Uses, Side Effects and Dosage

Updated:
Facts
Status:
Prescription (Rx) Boxed warning
Strength:
284 mg/1.5 mL
Active ingredient:

Patient information: uses, side effects, how to take - Tegsedi

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

TEGSEDI can cause serious side effects, including:

  • low platelet counts (thrombocytopenia). TEGSEDI may cause the number of platelets in your blood to be reduced reduced at any time during treatment. This is a common side effect of TEGSEDI. When your platelet count is too low, your body cannot form clots. You could have serious bleeding that could lead to death. Call your healthcare provider immediately if you have:

    • unusual bruising or a rash of tiny reddish-purple spots, often on the lower legs
    • bleeding from skin cuts that does not stop or oozes
    • bleeding from your gums or nose
    • blood in your urine or stools
    • bleeding into the whites of your eyes
    • sudden severe headaches or neck stiffness
    • vomiting or coughing up blood
    • abnormal or heavy periods (menstrual bleeding)
  • kidney inflammation (glomerulonephritis).Your kidneys may stop working properly. Glomerulonephritis can lead to severe kidney damage and kidney failure that needs dialysis. Call your healthcare provider immediately if you have:

    • puffiness or swelling in your face, feet or hands
    • new onset or worsening shortness of breath and coughing
    • blood in your urine or brown urine
    • foamy urine (proteinuria)
    • passed less urine than usual

Your healthcare provider will do laboratory tests to check your platelet count and kidneys before you start TEGSEDI and while you are using it. Your healthcare provider should also do laboratory tests for 8 weeks after you stop TEGSEDI. It is important that you make sure you get these laboratory tests done.

  • Because of the risk of serious bleeding caused by low platelet counts and because of the risk of kidney problems, TEGSEDI is available only through a restricted program called the TEGSEDI Risk Evaluation and Mitigation (REMS) Program.

    • Before you begin using TEGSEDI, you must enroll in the TEGSEDI REMS Program. Talk to your healthcare provider about how to enroll in the TEGSEDI REMS Program.
    • You must agree to get your laboratory testing done while you are in the TEGSEDI REMS Program.
    • You can only get TEGSEDI from a certified pharmacy that participates in the TEGSEDI REMS Program. Your healthcare provider can give you information on how to find a certified pharmacy.
    • For more information, including a list of certified pharmacies go to www.TEGSEDIREMS.com or call 1-844-483-4736.

What is TEGSEDI?

TEGSEDI is a medicine used to treat the polyneuropathy of hereditary transthyretin-mediated (hATTR) amyloidosis in adults. It is not known if TEGSEDI is safe and effective in children.

Do not use TEGSEDI if you have:

  • a platelet count that is low.
  • had kidney inflammation (glomerulonephritis) caused by TEGSEDI.
  • had an allergic reaction to inotersen or any of the ingredients in TEGSEDI. See the end of this Medication Guide for a complete list of ingredients in TEGSEDI.

Before you start using TEGSEDI, tell your healthcare provider about all your medical conditions, including if you:

  • have or had bleeding problems
  • have or had kidney problems
  • have received a liver transplant
  • are pregnant or plan to become pregnant. It is not known if TEGSEDI can harm your unborn baby.

    • There is a registry for women who become pregnant during treatment with TEGSEDI. If you become pregnant while taking TEGSEDI, talk to your healthcare provider about registering with the TEGSEDI Pregnancy Exposure Registry. The purpose of this registry is to collect information about your health and your baby’s health. You can get more information about this registry by calling: 1-877-465-7510, emailing: tegsedipregnancy@ubc.com, or visiting online at: www.tegsedipregnancystudy.com.
  • are breastfeeding or plan to breastfeed. It is not known if TEGSEDI can pass into your breast milk or harm your baby. Talk with your healthcare provider about the best way to feed your baby while you are using TEGSEDI.

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

Especially tell your healthcare provider if you take:

  • Vitamin A or beta-carotene supplements. Your healthcare provider should tell you to take vitamin A, but only take the amount they tell you to take.
  • blood thinners (anticoagulants) or medicines that affect blood clotting.
  • Ask your healthcare provider or pharmacist if you are not sure if you take any of these medicines. Know the medicines you take. Keep a list of them to show your healthcare provider or pharmacist when you get a new medicine.

How should I use TEGSEDI?

  • Read the detailed Instructions for Use that come with your TEGSEDI.
  • Your healthcare provider will show you or your caregiver how to inject TEGSEDI the first time.
  • If you or your caregiver have any questions, ask your healthcare provider.
  • TEGSEDI is injected under your skin (subcutaneously) in your stomach area (abdomen), or the front of your upper legs (thighs) by you or a caregiver. A caregiver may also give you an injection of TEGSEDI in the outer area of your upper arm.
  • Do not inject into the same site each time.
  • Do not inject into the 2-inch area around the belly-button (naval).
  • Do not inject where the skin is bruised, tender, red, or hard.
  • Do not inject into areas with scars or tattoos.
  • Do not inject through clothing.
  • Follow your healthcare provider’s instructions on when to inject TEGSEDI.
  • TEGSEDI should be injected 1 time each week on the same day.
  • If you miss a dose, take the missed dose as soon as possible, unless your next scheduled dose is within 2 days. If your next scheduled dose is within 2 days, skip the missed dose and take your next scheduled dose on the scheduled day.

What are possible side effects of TEGSEDI?

TEGSEDI may cause serious side effects, including:

  • See “What is the most important information I should know about TEGSEDI?”
  • stroke. TEGSEDI may cause a stroke. One person taking TEGSEDI had a stroke, which occurred within 2 days after the first dose.Signs or symptoms of stroke may include:

    • sudden numbness or weakness especially on one side of the body
    • severe headache or neck pain
    • confusion
    • problems with vision, speech, or balance
    • droopy eyelids

Get emergency help immediately if you have symptoms of stroke.

  • inflammatory and immune system problems.Some people taking TEGSEDI had serious inflammatory and immune system problems. Symptoms of inflammatory and immune system problems included unexpected change in walking, weakness and spasms in legs, back pain, weight loss, headache, vomiting, and problems with speech.
  • liver effects. TEGSEDI may cause liver problems. Your healthcare provider should do laboratory tests to check your liver before you start TEGSEDI and while you are using it. Tell your healthcare provider if you have symptoms that your liver may not be working right, which could include unexpected nausea and vomiting, stomach pain, being not hungry, yellowing of the skin, or having dark urine.
  • allergic reactions. TEGSEDI may cause serious allergic reactions. These allergic reactions often occur within 2 hours after injecting TEGSEDI. Get emergency help immediately if you have any symptoms of an allergic reaction including:
  • joint pain
  • chills
  • redness on palms of hands
  • muscle pain
  • chest pain
  • flushing
  • tremor or jerking movements
  • flu-like symptoms
  • high blood pressure
  • difficulty swallowing
  • eye problems (low vitamin A levels). Treatment with TEGSEDI will lower the Vitamin A levels in your blood. Your healthcare provider should tell you to take Vitamin A supplements while using TEGSEDI. Your healthcare provider will tell you how much to take. Call your healthcare provider if you get eye problems, such as having difficulty seeing at night or in low lit areas (night blindness). Your healthcare provider should send you to see an eye doctor (ophthalmologist).

The most common side effects of TEGSEDI include: injection site reactions (such as redness or pain at the injection site), nausea, headache, tiredness, low platelet counts (thrombocytopenia), and fever.

These are not all the possible side effects of TEGSEDI.

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

How should I store TEGSEDI?

  • Store TEGSEDI in the refrigerator between 36°F to 46°F (2°C to 8°C) in the original container.
  • Do not freeze.
  • TEGSEDI prefilled syringes can also be kept at room temperature that is no higher than 86°F (30°C) in the original container for up to 6 weeks.
  • Do not let TEGSEDI reach temperatures above 86°F (30°C).
  • If you do not use TEGSEDI kept at room temperature within 6 weeks, throw it away.
  • Protect from light.

Keep TEGSEDI and all medicines out of the reach of children.

General information about the safe and effective use of TEGSEDI

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use TEGSEDI for a condition for which it has not been prescribed. Do not give TEGSEDI to other people, even if they have the same symptoms that you have. It may harm them. You can ask your pharmacist or healthcare provider for information about TEGSEDI that was written for health professionals.

What are the ingredients in TEGSEDI? Active ingredients: inotersen

Inactive ingredients: purified water (water for injection), hydrochloric acid and or sodium hydroxide for pH adjustment

Distributed by Sobi, Inc, Waltham, MA

TEGSEDI is registered in the US Patent and Trademark Office© 2017

For more information about TEGSEDI, contact Sobi, Inc., at 1-844-483-4736 or go to www.TEGSEDIREMS.com.

This Instructions for Use has been approved by the U.S. Food and Drug AdministrationIssued:10/2018

TEGSEDI (Teg-SED-ee)

(inotersen) injection

for subcutaneous use

Instructions For Use

Introduction

Before using your TEGSEDI prefilled syringe, your healthcare provider should show you or your caregiver how to use it the right way. If you or your caregiver have any questions, ask your healthcare provider.

Read this Instructions for Use before you start using your TEGSEDI prefilled syringe and each time you get a refill. There may be new information. This information does not take the place of talking to your healthcare provider about your medical condition or your treatment.

Guide to parts
Important information
  • Store TEGSEDI in the refrigerator between 36°F to 46°F (2°C to 8°C) in the original container.
  • Do not freeze.
  • TEGSEDI prefilled syringes can also be kept at room temperature that is no higher than 86°F (30°C) in the original container for up to 6 weeks.
  • Do not let TEGSEDI reach temperatures above 86°F (30°C).
  • If you do not use TEGSEDI kept at room temperature within the 6 weeks, throw it away.
  • Protect from light.
  • Keep TEGSEDI and all medicines out of reach of children.

Each TEGSEDI prefilled syringe contains 1 dose of TEGSEDI and is for 1-time use only.

Warnings
  • Do not remove needle cap until you have reached Step 6 of the Injection phase of these instructions and are ready to inject TEGSEDI
  • Do not share your syringe with another person or re-use your syringe
  • Do not use if dropped onto a hard surface or damaged
  • Do not shake or freeze the prefilled syringe
  • Do not use if the expiration date on the side of the syringe body has passed

If any of the above happens, throw away the prefilled syringe in a puncture-resistant (sharps) container and use a new prefilled syringe.

Preparation
Step 1. Gather supplies
  • 1 TEGSEDI prefilled syringe from the refrigerator
  • 1 Alcohol wipe (not supplied)
  • 1 Gauze pad or cotton ball (not supplied)
  • 1 Puncture-resistant (sharps) container (not supplied)

Do not perform the injection without all the supplies listed.

Step 2. Prepare to use your TEGSEDI prefilled syringe
  • Remove the TEGSEDI tray from the carton and check the expiration date. Do not use if the expiration date has passed.
  • Let TEGSEDI warm up at room temperature 68°F to 77°F (20°C to 25°C) for 30 minutes before giving the injection.

    • Do not warm the syringe in any other way. For example, do not warm in a microwave or hot water, or near other heat sources.
  • Remove the syringe from the tray by holding onto the syringe body.

    • Do not move the plunger
    • Do not remove the syringe from the tray by holding onto the needle cap or plunger.
Step 3. Check medicine in the syringe
  • Look in the inspection area to check that the TEGSEDI solution is clear and colorless or pale yellow in color. It is normal to see air bubbles in the solution. You do not need to do anything about it.
  • Do not use if the solution looks cloudy, discolored, or has particles. Throw the prefilled syringe away in a puncture resistant (sharps) container, and use a new prefilled syringe.
Step 4. Choose the injection site
  • Choose an injection site on your abdomen or the front of your thigh.
  • Do not inject into the same site each time.
  • Do not inject into the 2 inch area around the belly-button (naval).
  • Do not inject where skin is bruised, tender, red, or hard.
  • Do not inject into areas of the skin with scars or tattoos.
  • Do not inject through clothing.
Step 5. Clean the injection site
  • Wash your hands with soap and water.
  • Clean the injection site with an alcohol wipe in a circular motion. Let the skin air dry.
  • Do not touch the area again before injecting.
Injection
Step 6. Remove the needle cap
  • Hold the syringe by the body, with the needle facing away from you.
  • Remove needle cap by pulling it straight off. Do not to twist it off.
  • You may see a drop of liquid at the end of the needle. This is normal.
  • Keep your hands away from the plunger to avoid pushing the plunger before you are ready to inject.

Do not remove the needle cap until right before you inject.

Do not pull the cap off while holding the syringe by the plunger. Always hold by the body of the syringe.

Do not let the needle touch any surface.

Do not remove any air bubbles from the syringe.

Do not put the needle cap back onto the syringe.

Step 7. Insert the needle
  • Hold the syringe in 1 hand.
  • Hold the skin around at the injection site as your healthcare provider has instructed you. You should either gently pinch the skin at the injection site or give the injection without pinching the skin.
  • Slowly insert the entire needle into the chosen injection site at a 90° angle until fully inserted.

Do not hold the syringe by the plunger or push against the plunger to insert the needle.

Step 8. Start the injection
  • Slowly and firmly push the plunger all the way down until the medicine is injected. Make sure the needle stays fully inserted in the injection site while you are injecting the medicine.
  • It is important to fully push the plunger all the way down.
  • Your syringe may make a click sound as you push the plunger down. This is normal. This does not mean that the injection is finished.
  • The plunger can feel stiffer towards the end of the injection. You may need to press a little harder on the plunger to make sure you have pushed it as far as it will go.

Do not let go of the plunger.

Step 9. Push the plunger down
  • Push firmly on the plunger at the end of the injection. Hold the plunger fully down and wait for 5 seconds. If you let go of the plunger too quickly, you may lose some of the medicine.
  • The plunger will start to lift automatically which means that the plunger has been pushed fully down.
  • Press down again if the plunger does not start to lift automatically.
Step 10. Complete the injection
  • Slowly lift up on the plunger and let the safety spring push the plunger up automatically.
  • The needle should now be retracted safely inside the syringe, and the safety mechanism spring visible on the outside of the plunger.
  • When the plunger comes to a stop, your injection is complete.
  • If the plunger does not rise up automatically when you release the pressure, it means the safety spring did not activate and you should push the plunger again but harder.
  • Throw away the cap and syringe into the puncture-resistant (sharps) container right away (See section - “Dispose of the used syringe”).

Do not pull the plunger up by hand. Lift the whole syringe straight up.

Do not try to replace the cap on the retracted needle.

Do not rub the injection site.

Disposal and care
Dispose of the used syringe
  • Put the used TEGSEDI prefilled syringe in a FDA-cleared sharps disposal container right away after use. Do not throw away (dispose of) the TEGSEDI prefilled syringe in your household trash.
  • If you do not have a FDA-cleared sharps disposal container, you may use a household container that is:
  • made of heavy-duty plastic,
  • can be closed with a tight-fitting, puncture-resistant lid, without sharps being able to come out,
  • upright and stable during use,
  • leak-resistant, and
  • properly labelled to warn of hazardous waste inside the container.
  • When your sharps disposal container is almost full, you will need to follow your community guidelines for the right way to dispose of your sharps disposal container. There may be state or local laws about how you should throw away used needles and syringes. For more information about sharps disposal, and for specific information about safe sharps disposal in the state that you live in, go to the FDA’s website at:

http://www.fda.gov/safesharpsdisposal

About this document

Source: FDA drug labeling via NLM DailyMed · Application number: NDA 211172 · View the label on DailyMed

Revision date stated in the text: October 2018

Found a mistake? Write to us via the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Tegsedi

Rx or OTC
Prescription (Rx)?
  • This drug is available only with a prescription from a licensed healthcare provider.
  • Rx
Boxed warning Yes – this drug has a boxed warning (also called a black box warning), the strongest warning of the FDA.
Drug class Antisense Oligonucleotide, Transthyretin-directed RNA Interaction
Active ingredient Inotersen sodium 284 mg/1.5 mL
Dosage form Injection, solution
Route Subcutaneous
Marketing status not in the current FDA NDC Directory
Company (applicant) AKCEA THERAPS
FDA approval NDA 211172New Drug Application (NDA) Approved October 5, 2018
Reference listed drug This is the reference listed drug (RLD) that generics are compared with.
Manufacturers 2 labelers list this drug on DailyMed
Packages (NDC)
Package
284 mg/1.5 mL – 1.5 ml in 1 syringe / 1 in 1 tray / 4 in 1 carton NDC 72126-007-02

Source: FDA drug labeling via NLM DailyMed, data as of October 31, 2026. FDA data (DailyMed, Orange Book, Drug Shortages, enforcement reports). Not a substitute for the advice of a doctor or pharmacist.