Drug updated on 5/17/2024

Dosage FormInjection: (intravenous; 10 mg/2 mL, 50 mg/10 mL, 100 mg/20 mL)
Drug ClassInterferon gamma blocking antibodies
Ongoing and
Completed Studies


  • Indicated for the treatment of adult and pediatric (newborn and older) patients with primary hemophagocytic lymphohistiocytosis (HLH) with refractory, recurrent or progressive disease or intolerance with conventional HLH therapy.

Latest News

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  • Emapalumab-lzsg (Gamifant) is indicated for the treatment of adult and pediatric patients with primary hemophagocytic lymphohistiocytosis (HLH), particularly those who are refractory, recurrent, or intolerant to conventional HLH therapy. It has shown promise due to its efficacy in bridging both adult and pediatric populations to potentially curative treatments like hematopoietic stem cell transplantation.
  • Two systematic reviews/meta-analyses compared Gamifant's safety and effectiveness against other therapies for treating primary HLH. These studies highlighted that emapalumab shows a wide range of partial response rates from 14.2% up to 100%, enabling many patients to proceed towards hematopoietic stem cell transplantation.
  • In terms of population types, most studies involving new drugs like emapalumab include mixed-age populations, but it was noted that adults typically have lower responses than children when treated with traditional HLH regimens such as the HLH-94 regimen.
  • Regarding safety considerations, emapalumab, along with other newer agents, is generally well-tolerated by patients, showing few or mild side effects; this is significant given the aggressive nature of HLH disease where toxicity can significantly impact outcomes.
  • Compared with conventional therapy, which involves intensive immunosuppressive and cytotoxic drugs often leading to numerous side effects, Gamifant presents fewer challenges, making it an attractive alternative, especially in cases where patients cannot tolerate first-line treatments.
  • Potential broader applications beyond its current indication have been suggested, including exploring the efficacy of emapalumab in secondary HLH prevention post-hematopoietic stem cell transplantation graft failure, indicating further advancements could be made within clinical management practices using this drug.

Product Monograph / Prescribing Information

Document TitleYearSource
Gamifant (emapalumab-lzsg) Prescribing Information.2022Sobi Inc., Waltham, MA

Systematic Reviews / Meta-Analyses

Clinical Practice Guidelines

Document TitleYearSource
Guide to Gamifant dosing and administration.2023Gamifant