The US Food and Drug Administration (FDA) has approved sarilumab (Kevzara) for the treatment of polyarticular juvenile idiopathic arthritis (pJIA) for patients weighing ≥ 63 kg (139 lb).
“Polyarticular juvenile idiopathic arthritis (JIA) can be a painful disease for children where multiple joints are impacted by this chronic inflammation,” said George D. Yancopoulos, MD, PhD, president and chief scientific officer at Regeneron in a press release.
It is estimated that nearly 300,000 children in the United States have JIA, and 1 in 4 of them have pJIA, according to the Arthritis Foundation.
“Not only are their daily lives impacted, but their futures can be disrupted without adequate treatment,” Yancopoulos continued. “The approval of Kevzara in polyarticular juvenile idiopathic arthritis provides these vulnerable patients and their families a new FDA-approved treatment option to help navigate this disease.”
Sarilumab, jointly developed by Sanofi and Regeneron, is an interleukin 6 receptor blocker. It was first approved in 2017 for the treatment of moderate to severely active rheumatoid arthritis (RA) in adults who had inadequate response or intolerance to at least one other disease-modifying antirheumatic drug (DMARD).
In 2023, the FDA approved sarilumab as the first biologic treatment for polymyalgia rheumatica in adults who had inadequate response to corticosteroids and could not tolerate a corticosteroid taper.
For pJIA, sarilumab is administered subcutaneously using a 200-mg/1.14-mL prefilled syringe once every 2 weeks. The medication can be used alone or in combination with other conventional DMARDs.
“Use of KEVZARA in pediatric patients with pJIA is supported by evidence from adequate and well-controlled studies of KEVZARA in adults with RA, pharmacokinetic data from adult patients with RA,” and pharmacokinetic comparability in 101 pediatric patients aged 2-17 years treated with sarilumab, according to the prescribing information. Sarilumab is not approved for pediatric patients <63 kg “because of a lack of an appropriate dosage form.”
The most common reported adverse reactions for sarilumab in pJIA are nasopharyngitis, neutropenia, upper respiratory tract infection, and injection site erythema. The pJIA trial recorded no new adverse reactions or safety concerns, compared with patients with RA.
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