Description and Brand Names

Drug information provided by: Merative, Micromedex®

US Brand Name

  1. Vyvgart

Descriptions


Efgartigimod alfa-fcab injection is used to treat a nerve and muscle problem called myasthenia gravis in patients who are anti-acetylcholine receptor (AChR) antibody positive.

This medicine is to be given only by or under the direct supervision of your doctor.

This product is available in the following dosage forms:

  • Solution

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of efgartigimod alfa-fcab injection in the pediatric population. Safety and efficacy have not been established.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of efgartigimod alfa-fcab injection in the elderly.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Adenovirus Vaccine, Live
  • Bacillus of Calmette and Guerin Vaccine, Live
  • Cholera Vaccine, Live
  • Dengue Tetravalent Vaccine, Live
  • Ebola Zaire Vaccine, Live
  • Influenza Virus Vaccine, Live
  • Measles Virus Vaccine, Live
  • Mumps Virus Vaccine, Live
  • Poliovirus Vaccine, Live
  • Rotavirus Vaccine, Live
  • Rubella Virus Vaccine, Live
  • Smallpox Monkeypox Vaccine, Live Non-Replicating
  • Smallpox Vaccine
  • Typhoid Vaccine, Live
  • Varicella Virus Vaccine, Live
  • Yellow Fever Vaccine
  • Zoster Vaccine, Live

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Infection, history of—May decrease your body's ability to fight infection.

Proper Use

A nurse or other trained health professional will give you this medicine in a medical facility. It is given through a needle placed into one of your veins. The medicine must be given slowly, so the needle will have to remain in place for at least 1 hour. It is usually given once a week for 4 weeks.

Missed Dose

Call your doctor or pharmacist for instructions.

Precautions

It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.

Call your doctor right away if you start to have a cough that would not go away, weight loss, night sweats, fever, chills, flu-like symptoms (eg, runny or stuffy nose, headache, blurred vision, or feeling generally ill), painful or difficult urination, or sores, ulcers, or white spots in the mouth or on the lips. These may be signs that you have an infection.

This medicine may cause serious allergic reactions, including anaphylaxis and angioedema, which can be life-threatening and require immediate medical attention. Tell your doctor right away if you have chest tightness, cough, difficulty swallowing, dizziness, fast heartbeat, hives, itching, skin rash, large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals, puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue, trouble breathing, or unusual tiredness or weakness after using this medicine.

This medicine may cause hypotension (low blood pressure) which may lead to fainting. Check with your doctor right away if you have blurred vision, confusion, dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position, sweating, or unusual tiredness or weakness.

While you are being treated with efgartigimod alfa-fcab, do not have any immunizations (vaccines) without your doctor's approval. Live virus vaccines should not be given with efgartigimod alfa-fcab.

This medicine may cause infusion-related reactions. Check with your doctor right away if you have back pain, blurred vision, chest tightness, chills, dizziness, fever, flushing, headache, nausea and vomiting, nervousness, pounding in the ears, slow or fast heartbeat, stomach pain, trouble breathing, or weakness.

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur:

More common

  1. Bladder pain
  2. bloody or cloudy urine
  3. cough
  4. difficult, burning, or painful urination
  5. difficulty in moving
  6. fever
  7. frequent urge to urinate
  8. joint pain
  9. lower back or side pain
  10. muscle aches, cramps, pain, or stiffness
  11. sneezing
  12. sore throat
  13. swollen joints

Incidence not known

  1. Back pain
  2. blurred vision
  3. chest tightness
  4. chills
  5. confusion
  6. difficulty in breathing or swallowing
  7. dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
  8. fast heartbeat
  9. flushing
  10. headache
  11. large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  12. nausea and vomiting
  13. nervousness
  14. pounding in the ears
  15. puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  16. skin itching, rash, or redness
  17. sweating
  18. swelling of the face, throat, or tongue
  19. trouble breathing

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

  1. Burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

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

Portions of this document last updated: Feb. 01, 2024

Original article: https://www.mayoclinic.org/drugs-supplements/efgartigimod-alfa-fcab-intravenous-route/description/drg-20528239