Arcalyst

Rilonacept · Kiniksa Pharmaceuticals (UK), Ltd.
PRESCRIPTION ONLY (USA)

Arcalyst ingredients

Active ingredientStrength
Rilonacept160 mg/2mL

What Arcalyst is used for

Arcalyst is a specialist medicine. Its approved uses are listed on the official FDA label below.

Key facts

Brand
Arcalyst
Generic name
Rilonacept
Made by
Kiniksa Pharmaceuticals (UK), Ltd.
Forms
Injection, Powder, Lyophilized, For Solution
Given
Subcutaneous
FDA approval
Biologic licence (BLA) BLA125249
On the US market since
2008

Official information

Specialist medicine: started and supervised by a specialist doctor or hospital. This page is a plain-language summary of public official information, not medical advice; follow your doctor and the official product information.

Common questions

What is Arcalyst?

Arcalyst (Rilonacept) is a specialist medicine made by Kiniksa Pharmaceuticals (UK), Ltd., approved by the US FDA.

What are the ingredients of Arcalyst?

Arcalyst contains Rilonacept (160 mg/2mL).

From the FDA National Drug Code directory (open.fda.gov, public domain). Page made 5 November 2026 by Satya Babu.

← All specialty medicines, USA

For information only, not medical advice. This page is a plain-language summary written from standard prescribing information and the public guides linked below. Brands sometimes change their formula, so always check the composition printed on the pack. Doses here are typical adult doses; yours may differ. Do not start, stop or change a medicine without your doctor or pharmacist, and keep all medicines away from children. In an emergency, call 112 (India) or your local emergency number.