Medications and Drugs
Brand Names: Arcalyst
Generic Name: rilonacept (Pronunciation: ril ON a sept)
What is rilonacept (Arcalyst)?
Rilonacept is used to treat some of the symptoms of rare genetic conditions such as Familial Cold Auto-inflammatory Syndrome (FCAS) or Muckle-Wells Syndrome (MWS).
FCAS and MWS are inflammatory disorders in which the body develops certain symptoms without a known cause (such as virus, bacteria, or illness). These symptoms include fever, chills, fatigue, and joint pain. More serious symptoms may involve the bones and joints, the central nervous system (deafness, vision loss, mental impairment), or major organs such as the kidneys.
Rilonacept may treat or prevent the symptoms of Familial Cold Auto-inflammatory Syndrome (FCAS) or Muckle-Wells Syndrome (MWS). However, this medication is not a cure for these inherited conditions.
Rilonacept may also be used for purposes not listed in this medication guide.
What are the possible side effects of rilonacept (Arcalyst)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Serious and sometimes fatal infections may occur during treatment with rilonacept. Call your doctor right away if you have any new signs of infection such as:
Call your doctor at once if you have any other serious side effect such as:
Other common side effects may include:
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.
What is the most important information I should know about rilonacept (Arcalyst)?
Serious and sometimes fatal infections may occur during treatment with rilonacept. Call your doctor right away if you have signs of infection such as: fever, chills, sore throat, flu symptoms, easy bruising or bleeding (nosebleeds, bleeding gums), loss of appetite, nausea and vomiting, mouth sores, or unusual weakness.
You should not use this medication if you are allergic to rilonacept, or if you have any type of infection.
Before using rilonacept, tell your doctor if you have an active or chronic infection, a history of tuberculosis or recurrent infections, or high cholesterol or triglycerides. Make sure you are current on all vaccines before you start treatment with rilonacept.
Do not receive a "live" vaccine while using rilonacept. The vaccine may not work as well during this time, and may not fully protect you from disease. Avoid coming into contact with anyone who has recently received a live vaccine. There is a chance that the virus could be passed on to you.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Drugs and Treatment Resources
- How Well Are You Living With AFib?
- How Well Are You Managing Your MS?
- Soothe Your Child's Cold or Flu