C1-esterase inhibitor - injection
C1-esterase inhibitor - injection
This medication is used to help prevent swelling problems that occur with a certain immune disease passed down through families (hereditary angioedema-HAE). HAE is caused by low levels or improper function of a natural substance produced by the body (C1-inhibitor). Symptoms such as rapid swelling of the hands, feet, limbs, face, tongue, or throat can occur. Swelling of the intestinal tract may cause symptoms such as abdominal cramps, diarrhea, or vomiting. Attacks of swelling may occur without reason. However, anxiety, stress, sickness, and surgery may trigger attacks in some people. This medication increases the level of C1-inhibitor to help prevent attacks of sudden swelling due to hereditary angioedema.
Read the Patient Information Leaflet and Instructions for Use if available from your pharmacist before you start using this medication and each time you get a refill. If you have any questions, ask your doctor or pharmacist.
This medication is given by injection into a vein, usually every 3 or 4 days, or as directed by your doctor. Dosage is based on your medical condition and response to treatment.
If you are giving this medication to yourself at home, learn all preparation and usage instructions from your health care professional. The solution is normally clear and colorless to slightly blue, depending on the brand. Before using, check this product visually for particles or discoloration. If either is present, do not use the liquid. Learn how to store and discard medical supplies safely.
Use this medication regularly to get the most benefit from it.
Tell your doctor if your condition does not improve or if it worsens.
Headache may occur. Other side effects are uncommon. If you notice any unusual side effects, tell your doctor or pharmacist promptly.
This medication may rarely cause blood clots (such as pulmonary embolism, stroke, heart attack, deep vein thrombosis), especially when used at high doses. You may be at increased risk for blood clots if you have a history of blood clots, heart/blood vessel disease, heart failure, stroke, or if you are immobile (such as on very long plane flights or being bedridden). If you use estrogen-containing products, these may also increase your risk. Before using this medication, if you have any of these conditions report them to your doctor or pharmacist. Get medical help right away if any of these side effects occur:
In the US -
Before using C1-inhibitor, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before using this medication, tell your doctor or pharmacist your medical history, especially of:
This medication is made from human blood. Even though the blood is carefully tested and this medication goes through a special manufacturing process, there is an extremely small chance that you may get infections from the medication (for example, virus infections such as hepatitis). Consult your doctor or pharmacist for more information.
It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Do not share this medication with others.
Before traveling, talk to your doctor to make sure you have enough of this medication.
For the best possible benefit, it is important to receive each scheduled dose of this medication as directed. If you miss a dose, contact your doctor or pharmacist right away to establish a new dosing schedule. Do not double the dose to catch up.
Store the unmixed vial in the original carton between 36-77 degrees F (2-25 degrees C) away from light. Do not freeze. After mixing, use this medication right away or within 3 hours. Do not refrigerate the mixed solution. Discard any unused portion. Keep all medications away from children and pets.
Information last revised July 2017.
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