WARNING: CYTOKINE RELEASE SYNDROME and NEUROLOGICAL TOXICITIES
- Cytokine release syndrome (CRS), including fatal or life-threatening reactions, occurred in patients receiving KYMRIAH. Do not admini…+
KYMRIAH is a CD19-directed genetically modified autologous T cell immunotherapy indicated for the treatment of adult patients with relapsed or refractory (r/r) follicular lymphoma (FL) after two or more lines of systemic therapy.
This indication is approved under accelerated approval based on response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in confirmatory trial(s).
Warnings and Precautions
Cytokine Release Syndrome: CRS, including fatal or life-threatening reactions, occurred following treatment with KYMRIAH. CRS occurred in 51 (53%) of the 97 adult patients with r/r FL receiving KYMRIAH. The median times to onset and resolution of CRS were 4 days (range: 1-14) and 4 days (range: 1-13), respectively. Of the 51 patients with CRS, 15 (29%) received systemic anticytokine treatment with tocilizumab. Three (6%) patients required 3 dosages of tocilizumab, 4 (8%) patients required 2 dosages, and 8 (16%) patients required a single dose of tocilizumab. Two (4%) patients received corticosteroids in addition to tocilizumab.
Among patients with r/r FL with CRS, key manifestations included fever (92%), hypotension (40%), hypoxia (19%), and tachycardia (2%). CRS may be associated with hepatic, renal, and cardiac dysfunction, and coagulopathy.
Delay KYMRIAH infusion after lymphodepleting chemotherapy if patient has unresolved serious adverse reactions from preceding chemotherapies, active uncontrolled infection, active graft vs host disease, or worsening of leukemia burden.
Ensure that a minimum of 2 doses of tocilizumab are available on-site prior to infusion of KYMRIAH. Monitor patients 2 to 3 times during the first week following KYMRIAH infusion at the REMS-certified health care facility for signs and symptoms of CRS. Monitor patients for signs or symptoms of CRS for at least 4 weeks after treatment with KYMRIAH. At the first sign of CRS, immediately evaluate patient for hospitalization and institute treatment with supportive care, tocilizumab and/or corticosteroids as indicated.
Counsel patients to seek immediate medical attention should signs or symptoms of CRS occur at any time.
Neurological Toxicities: Neurological toxicities, including severe or life-threatening reactions, occurred following treatment with KYMRIAH. Neurological toxicities occurred in 42 (43%) of the 97 patients with r/r FL, including ≥ grade 3 in 6%. The median times to the first event and duration were 8 days (range: 1-345) and 5 days, respectively.
Among KYMRIAH patients who had a neurological toxicity, 84% occurred within 8 weeks following KYMRIAH infusion. Resolution occurred within 3 weeks in 74% of patients with
Encephalopathy lasting up to 70 days was noted. The onset of neurological toxicity can be concurrent with CRS, following resolution of CRS, or in the absence of CRS.
The most common neurological toxicities observed in patients with r/r FL included headache (25%), encephalopathy (3%), delirium (1%), anxiety (2%), sleep disorders (6%), dizziness (7%), tremor (3%), and peripheral neuropathy (7%). Other manifestations included seizures and aphasia.
Monitor patients 2 to 3 times during the first week following KYMRIAH infusion at the REMS-certified health care facility for signs and symptoms of neurological toxicities. Rule out other causes of neurological symptoms. Monitor patients for signs or symptoms of neurological toxicities for at least 4 weeks after infusion and treat promptly. Neurological toxicity should be managed with supportive care and/or corticosteroids as needed.
Counsel patients to seek immediate medical attention should signs or symptoms of neurological toxicity occur at any time.
KYMRIAH REMS to Mitigate CRS and Neurological Toxicities: Because of the risk of CRS and neurological toxicities, KYMRIAH is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS) called the KYMRIAH REMS. The required components of the KYMRIAH REMS are:
Hemophagocytic Lymphohistiocytosis (HLH)/Macrophage Activation Syndrome (MAS): HLH/MAS, which can be life-threatening or fatal, has occurred following treatment with KYMRIAH. One patient (1%) with r/r FL developed HLH with a fatal outcome >1 year after receiving KYMRIAH. The patient did not have CRS during or immediately preceding HLH. Treatment of HLH should be administered as per institutional standards.
Hypersensitivity Reactions: Allergic reactions may occur with KYMRIAH. Serious hypersensitivity reactions, including anaphylaxis, may be due to dimethyl sulfoxide or dextran 40 in KYMRIAH. Observe patients for hypersensitivity reactions during the infusion.
Serious Infections: Infections, including life-threatening or fatal infections, occurred in 50 (52%) of the 97 patients with r/r FL; 20 patients (21%) experienced ≥ grade 3 infections, including fatal infection in 1 patient (1%). Prior to KYMRIAH infusion, infection prophylaxis should follow local guidelines. Patients with active uncontrolled infection should not start KYMRIAH treatment until the infection is resolved. Monitor patients for signs and symptoms of infection after treatment with KYMRIAH and treat appropriately.
Febrile neutropenia (≥ grade 3) was also observed in 13% of patients with r/r FL after KYMRIAH infusion and may be concurrent with CRS. In the event of febrile neutropenia, evaluate for infection and manage with broad spectrum antibiotics, fluids, and other supportive care as medically indicated.
Hepatitis B virus (HBV) reactivation, in some cases resulting in fulminant hepatitis, hepatic failure, and death, can occur in patients treated with drugs directed against B cells. There is no experience with manufacturing KYMRIAH for patients with a positive test for HIV or with active HBV or active hepatitis C virus (HCV). Perform screening for HBV, HCV, and HIV in accordance with clinical guidelines before collection of cells for manufacturing.
Prolonged Cytopenias: Patients may exhibit cytopenias for several weeks following lymphodepleting chemotherapy and KYMRIAH infusion. In patients with r/r FL, ≥ grade 3 cytopenias not resolved by Day 28 following KYMRIAH treatment included thrombocytopenia (17%) and neutropenia (16%) among 97 treated patients. Prolonged neutropenia has been associated with increased risk of infection. Myeloid growth factors, particularly granulocyte-macrophage colony-stimulating factor, are not recommended during the first 3 weeks after KYMRIAH infusion or until CRS has resolved.
Hypogammaglobulinemia: Hypogammaglobulinemia and agammaglobulinemia related to B-cell aplasia can occur in patients after KYMRIAH infusion. Hypogammaglobulinemia was reported in 18% of patients with r/r FL. Monitor immunoglobulin levels after treatment with KYMRIAH and manage using infection precautions, antibiotic prophylaxis, and immunoglobulin replacement standard guidelines.
The safety of immunization with live vaccines during or following KYMRIAH treatment has not been studied. Vaccination with live vaccines is not recommended for at least 6 weeks prior to the start of lymphodepleting chemotherapy, during KYMRIAH treatment, and until immune recovery following treatment with KYMRIAH.
Pregnant women who have received KYMRIAH may have hypogammaglobulinemia. Assess immunoglobulin levels in newborns of mothers treated with KYMRIAH.
Secondary Malignancies: Patients treated with KYMRIAH may develop secondary malignancies or recurrence of their cancer. Monitor lifelong for secondary malignancies. If a secondary malignancy occurs, call 1-844-4KYMRIAH to obtain instructions on patient samples to collect for testing.
Effects on Ability to Drive and Use Machines: Due to the potential for neurological events, including altered mental status or seizures, patients receiving KYMRIAH are at risk for altered or decreased consciousness or coordination in the 8 weeks following infusion. Advise patients to refrain from driving and engaging in hazardous occupations or activities, such as operating heavy or potentially dangerous machinery, during this initial period.
HIV and the lentivirus used to make KYMRIAH have limited, short spans of identical genetic material (RNA). Therefore, some commercial HIV nucleic acid tests may yield false positive results in patients who have received KYMRIAH.
Pregnancy, Lactation, Females and Males of Reproductive Potential
No data are available of KYMRIAH use in pregnant or lactating women. Therefore, KYMRIAH is not recommended for women who are pregnant or breastfeeding. A risk to the breastfed infant cannot be excluded. Pregnancy after KYMRIAH administration should be discussed with the treating physician. Pregnancy status of females of reproductive potential should be verified with a pregnancy test prior to starting treatment with KYMRIAH. Report pregnancies to Novartis Pharmaceuticals Corporation at 1-888-669-6682.
The most common adverse reactions (>20%) reported in patients with r/r FL were CRS, infections-pathogen unspecified, fatigue, musculoskeletal pain, headache, and diarrhea.
Please see full Prescribing Information for KYMRIAH, including Boxed WARNING, and Medication Guide.