Description
Efgartigimod alfa and hyaluronidase-qvfc combination injection is used to treat a nerve and muscle problem called generalized myasthenia gravis (gMG) in patients who are anti-acetylcholine receptor (AChR) antibody positive. This medicine is also used to treat a nerve problem called chronic inflammatory demyelinating polyneuropathy (CIDP).
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 and hyaluronidase-qvfc combination 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 and hyaluronidase-qvfc combination 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. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.
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 as a shot under your skin in the stomach area. It is usually given once a week for 4 weeks in patients with gMG and once a week in patients with CIDP.
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 does 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 sex organs, 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.
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.
While you are being treated with efgartigimod alfa and hyaluronidase-qvfc combination injection, do not have any immunizations (vaccines) without your doctor's approval. Live virus vaccines should not be given with efgartigimod alfa and hyaluronidase-qvfc combination.
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
- Bladder pain
- bloody or cloudy urine
- cough
- difficult, burning, or painful urination
- difficulty in moving
- fever
- frequent urge to urinate
- joint pain
- lower back or side pain
- muscle aches, cramps, pain, or stiffness
- sneezing
- sore throat
- swollen joints
Incidence not known
- Back pain
- blurred vision
- chest tightness
- chills
- confusion
- difficulty breathing or swallowing
- dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
- fast heartbeat
- flushing
- headache
- large, hive-like swelling on face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
- nausea and vomiting
- nervousness
- pounding in the ears
- puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
- skin itching, rash, or redness
- sweating
- swelling of the face, throat, or tongue
- trouble breathing
- unusual tiredness or weakness
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
- 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.
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