Skip to main content


Generic name: pegcetacoplan [ peg-SET-a-KOE-plan ]
Brand name: Empaveli
Dosage form: subcutaneous solution (1080 mg/20 mL)
Drug class: Selective immunosuppressants

Medically reviewed by on Jun 22, 2021. Written by Cerner Multum.

What is pegcetacoplan?

Pegcetacoplan is used to treat paroxysmal nocturnal hemoglobinuria (PNH) in adults.

Pegcetacoplan is available only under a special program. You must be registered in the program and understand the risks and benefits of pegcetacoplan.

Pegcetacoplan may also be used for purposes not listed in this medication guide.


You may get infections more easily, even serious or fatal infections. Call your doctor if you have a fever, flu-like symptoms, muscle pain, headache, confusion, neck or back stiffness, vomiting, rash, or your eyes are more sensitive to light.

You will need to receive certain vaccinations before you start using pegcetacoplan.

Read the Patient Safety Card about serious infections and the symptoms to watch for. Keep the card with you at all times while using pegcetacoplan and for at least 2 months after your last dose. Your infection risk could last for several weeks after you stop using pegcetacoplan.

Before taking this medicine

You should not be treated with pegcetacoplan if you are allergic to it, if you have a serious infection (such as pneumonia, meningitis or influenza type B), or if you are not currently vaccinated against these diseases (unless the risks of delaying treatment outweigh the risks of developing an infection).

At least 2 weeks before you start using pegcetacoplan, you will need to receive vaccines to protect against meningococcal infections, pneumonia, and influenza type B (Hib). Even if you've received these vaccinations in the past, you may need them again.

If you need to start receiving pegcetacoplan before you are vaccinated, you may be given antibiotic medicine to take during the first 2 weeks of pegcetacoplan treatment.

Tell your doctor if you have recently had any symptoms of infection (fever, chills, or flu-like symptoms).

May harm an unborn baby. You may need a pregnancy test to make sure you are not pregnant. Use birth control while using pegcetacoplan and for at least 40 days after your last dose. Tell your doctor if you become pregnant.

Do not breastfeed while using this medicine, and for at least 40 days after your last dose.

Not approved for use by anyone younger than 18 years old.

How is pegcetacoplan given?

Follow all directions on your prescription label and read all medication guides or instruction sheets. Use the medicine exactly as directed.

If you've been using another drug called ravulizumab (Ultomiris), you will need to wait 4 weeks after your last dose of ravulizumab before starting treatment with pegcetacoplan.

If you've been using another drug called eculizumab (Soliris), keep using it for 4 weeks after your first dose of pegcetacoplan and then stop the eculizumab.

Pegcetacoplan is injected under your skin with an infusion pump, usually twice per week or once every 3 days. You may be able to give this injection to yourself.

Read and follow all Instructions for Use. Ask your doctor or pharmacist if you need help.

Prepare an injection only when you are ready to give it. Call your pharmacist if the medicine looks cloudy, has changed colors, or has particles in it.

Do not reuse a needle or syringe. Place them in a puncture-proof "sharps" container and dispose of it following state or local laws. Keep out of the reach of children and pets.

You may get infections more easily, even serious or fatal infections. You will need frequent medical tests.

Pegcetacoplan can have long lasting effects on your body, even after you stop using this medicine. If you have PNH and you stop using pegcetacoplan, your doctor may need to check your progress for at least 8 weeks after your last dose.

Read the Patient Safety Card about serious infections and the symptoms to watch for. Keep the card with you at all times while using pegcetacoplan and for at least 2 months after your last dose. Your infection risk could last for several weeks after you stop using pegcetacoplan.

This medicine can affect the results of certain medical tests. Tell any doctor who treats you that you are using pegcetacoplan.

Store vials in the refrigerator, in the original carton to protect from light. Do not use expired pegcetacoplan.

What happens if I miss a dose?

Use the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not use two doses at one time.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while using pegcetacoplan?

Avoid injecting into skin that is red, bruised, hard, tender, injured, or irritated. Do not inject pegcetacoplan into skin areas with scars, stretch marks, or tattoos.

Pegcetacoplan side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Some side effects may occur during the infusion. Tell your caregiver if you feel light-headed or if you have chest pain, trouble breathing, or swelling in your face.

Call your doctor right away if you have signs of infection such as:

  • muscle pain with flu-like symptoms (fever, chills);

  • fever and a rash or headache;

  • headache with nausea and vomiting or stiffness in your neck or back;

  • clammy skin;

  • extreme pain;

  • fast heartbeats, shortness of breath;

  • confusion; or

  • your eyes may be more sensitive to light.

If you stop using pegcetacoplan, tell your doctor if you have any new or worsening symptoms, such as: tiredness, confusion, stomach pain, trouble breathing or swallowing, blood in your urine, (in men) trouble having an erection, chest pain, pain in one leg, or numbness or weakness on one side of the body.

Common side effects of pegcetacoplan may include:

  • stomach pain, vomiting, diarrhea;

  • cold sores;

  • cold symptoms such as stuffy nose, sneezing, sore throat, cough;

  • tiredness; or

  • pain, itching, warmth, redness, bruising, bleeding, swelling, or a hard lump where the medicine was injected.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Pegcetacoplan dosing information

Usual Adult Dose for Paroxysmal Nocturnal Hemoglobinuria:

Subcutaneous: 1,080 mg twice weekly infused via a commercially available infusion pump with a reservoir of at least 20 mL

To reduce the risk of hemolysis with abrupt treatment discontinuation when switching from C5 inhibitors:
-For patients switching from eculizumab, initiate this drug while continuing eculizumab at its current dose. After 4 weeks, discontinue eculizumab before continuing on monotherapy with this drug
-For patients switching from ravulizumab, initiate this drug no more than 4 weeks after the last dose of ravulizumab

-Vaccinate against encapsulated bacteria, including Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae type B at least 2 weeks prior to initiating therapy according to current ACIP guidelines.
-It is recommended to provide 2 weeks of antibacterial drug prophylaxis if this drug must be initiated immediately and vaccines are administered less than 2 weeks before starting therapy.

Use: For the treatment of adult patients with paroxysmal nocturnal hemoglobinuria (PNH)

What other drugs will affect pegcetacoplan?

Other drugs may affect pegcetacoplan, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all other medicines you use.

Where can I get more information?

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Popular FAQ

Empaveli and Soliris are both monoclonal antibodies (also called biologics) but Empaveli is more effective than Soliris at treating paroxysmal nocturnal hemoglobinuria (PNH). People administered Empaveli were more likely to have higher hemoglobin levels after 16 weeks than people administered Soliris, with research reporting a difference in hemoglobin level of 3.84 g per decilitre. In addition, 85% of people receiving Empaveli no longer required blood transfusions, compared to only 15% of people administered Soliris. Continue reading

Empaveli has effects on the complement system, which is a part of the immune system that enhances (or complements) the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and attack the pathogen's cell membrane. Empaveli binds to complement protein C3 and prevents C3 from splitting into C3a and C3b. This helps to stop intravascular hemolysis (IVH or the destruction of red blood cells in the circulation) and extravascular hemolysis (EVH or the breakdown of red blood cells in the spleen, bone marrow, or liver by macrophages). Empaveli is the only treatment that targets C3 and may prevent both forms of red blood cell destruction (IVH and EVH) in adults with paroxysmal nocturnal hemoglobinuria (PNH). Continue reading

Empaveli is given subcutaneously (this means under the skin) using an infusion pump, into a clear area of skin on your stomach (avoid around the belly button), top of the thighs, hips, or upper arms. Your doctor or nurse will show you how to do this so you can administer it at home, or a caregiver can administer it to you. Empaveli is usually given twice a week, although in some people their healthcare provider may instruct them to infuse it every three days.
The typical infusion time is approximately 30 minutes (if using two infusion sites) or approximately 60 minutes (if using one infusion site). See the product information for details about the administration process. Continue reading

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.