On July 2, 2025, the Food and Drug Administration (FDA) approved Lynozyfic™ (linvoseltamab-gcpt) for the treatment of adult patients with relapsed (the cancer has returned after a period of time when the symptoms of the disease had temporarily lessened or disappeared) or refractory (the cancer either has stopped responding to treatment or has not responded to treatment) multiple myeloma. Multiple myeloma is a type of blood cancer involving a specific kind of white blood cells, called plasma cells, in the bone marrow. There is currently no cure for multiple myeloma, and the goal of treatment is to slow down the progression of disease. Lynozyfic™ is not a first-line therapy and is indicated in patients who have already received at least four other prior lines of therapy to treat their cancer. The FDA granted Lynozyfic™ an accelerated approval, which allows new drugs that fill an unmet need and/or treat a serious medical condition, like cancer, to be approved more quickly based on initial evidence showing clinical benefit. In an ongoing open-label, multicenter Phase 1/2 clinical trial, called LINKER-MM1, Lynozyfic™ achieved a 70% objective response rate (ORR) with the treatment, with 45% of participants achieving a complete response (CR). In addition, Lynozyfic™ demonstrated duration of response between 9 to 12 months at the time of analysis. The FDA requires confirmatory clinical trials for drugs that receive accelerated approval to confirm initial findings and validate efficacy.
Lynozyfic™ works by directing immune cells, called T cells, to kill multiple myeloma cancer cells. A healthcare provider must administer Lynozyfic™ intravenously (IV), and hospitalization is required for 24 hours after the first and second step-up doses to monitor patient for any severe adverse reactions to the medication. Lynozyfic™ has a “boxed warning”, also called a “black box warning”, in the package labeling to indicate potentially significant adverse side effects, a requirement by the FDA based on findings in clinical studies to communicate serious risks associated with a medication to healthcare providers and patients. Lynozyfic™ is only available through a restricted program, called a Risk Evaluation and Mitigation Strategy (REMS) program. REMS programs are required by the FDA for certain drugs with significant safety warnings to help ensure that benefits of therapy outweigh risks through communication, education, and/or patient monitoring.