OMISIRGE is contraindicated in patients with known hypersensitivity to dimethyl sulfoxide (DMSO), Dextran 40, gentamicin, human serum albumin, or bovine material.

Graft-versus-Host Disease
Acute and chronic graft-versus-host disease (GvHD) have occurred following treatment with OMISIRGE. Acute GvHD manifests as maculopapular rash, gastrointestinal symptoms, and elevated bilirubin. Chronic GvHD manifests as skin rash, oral symptoms, ocular dryness, transaminase elevations, gastrointestinal symptoms, or serositis. Patients treated with OMISIRGE should receive immunosuppressive drugs to decrease the risk of GvHD, and be monitored for signs and symptoms of GvHD, and treated if GvHD develops.

Hypersensitivity and Infusion-Related Reactions
Hypersensitivity and infusion-related reactions have occurred with OMISIRGE administration. Serious hypersensitivity reactions, including anaphylaxis, may be due to DMSO, residual gentamicin, Dextran 40, human serum albumin (HSA), and bovine material in OMISIRGE. OMISIRGE may contain residual antibiotics if the cord blood donor was exposed to antibiotics in utero. Patients with a history of allergic reactions to antibiotics should be monitored for allergic reactions following OMISIRGE administration.

Signs and symptoms of hypersensitivity reactions may include bronchospasm, wheezing, angioedema, pruritus, hives, fever, and hypotension during or after OMISIRGE infusion. Infusion-related reactions may begin within minutes of the start of infusion of OMISIRGE, although symptoms may continue to intensify and not peak for several hours after the completion of the infusion.

Premedicate patients with antipyretics, histamine antagonists, and corticosteroids and monitor closely for signs and symptoms of hypersensitivity and infusion-related reactions. When a reaction occurs, pause the infusion and institute supportive care as needed.

Autoimmune Cytopenias
Autoimmune cytopenias (AICs) have occurred with OMISIRGE administration in patients with SAA. AIC is characterized by thrombocytopenia, anemia, and neutropenia, alone or in combination, occurring weeks to months post-transplant, often after initial hematopoietic recovery. Risk factors for post-transplant AIC include younger age, ATG-containing conditioning, underlying SAA, and delayed T cell chimerism. Monitor blood counts prior to and after OMISIRGE infusion. Manage cytopenias according to local institutional guidelines.

Graft Failure
Graft failure has occurred with OMISIRGE administration. Primary graft failure, which may be fatal, is defined as failure to achieve an absolute neutrophil count greater than 500 per microliter blood by Day 42 after transplantation. Immunologic rejection is the primary cause of graft failure. Patients should be monitored for laboratory evidence of hematopoietic recovery.

Malignancies of Donor Origin
Malignancy of donor origin, including post-transplant lymphoproliferative disorder (PTLD), has occurred with OMISIRGE administration. PTLD manifests as a lymphoma-like disease favoring non-nodal sites. PTLD is usually fatal if not treated. The etiology is thought to be donor lymphoid cells transformed by Epstein-Barr virus (EBV). Serial monitoring of blood for EBV DNA may be warranted in patients with persistent cytopenias. A donor-cell derived myelodysplastic syndrome (MDS) has occurred with OMISIRGE administration. The natural history is presumed to be the same as that for de novo MDS. Monitor life-long for secondary malignancies. In the event that a secondary malignancy occurs, contact Gamida Cell at (844) 477-7478.

Engraftment Syndrome
Engraftment syndrome may occur because OMISIRGE is derived from umbilical cord blood. Monitor patients for unexplained fever, rash, hypoxemia, weight gain, and pulmonary infiltrates in the peri-engraftment period. Treat with corticosteroids as soon as engraftment syndrome is recognized to ameliorate symptoms. If untreated, engraftment syndrome may progress to multiorgan failure and death.

Transmission of Serious Infections
Transmission of infectious disease may occur because OMISIRGE is derived from umbilical cord blood. Disease may be caused by known or unknown infectious agents. Donors are screened for increased risk of infection with human immunodeficiency virus (HIV), human T-cell lymphotropic virus (HTLV), hepatitis B virus (HBV), hepatitis C virus (HCV), T pallidum, West Nile virus (WNV), transmissible spongiform encephalopathy (TSE) agents, vaccinia, and Zika virus [for umbilical cord blood (UCB) collected between March 2016 and 20 May 2024]. Donors are also screened for clinical evidence of sepsis and communicable disease risks associated with xenotransplantation. Maternal blood samples are tested for HIV types 1 and 2, HTLV types I and II, HBV, HCV, T pallidum, and WNV. OMISIRGE is tested for sterility, endotoxin, and mycoplasma. There may be an effect on the reliability of the sterility test results if the cord blood donor was exposed to antibiotics in utero. These measures do not totally eliminate the risk of transmitting these or other transmissible infectious diseases and disease agents. Testing of maternal and infant donor blood is also performed for evidence of donor infection due to cytomegalovirus (CMV).

Test results may be found on the container label and/or in accompanying records.

Product manufacturing includes bovine-derived reagents. While all animal-derived reagents are tested for animal viruses, bacteria, fungi, and mycoplasma before use, these measures do not eliminate the risk of transmitting these or other transmissible infectious diseases and disease agents. Final sterility test results may not be available at the time of use, but Quality Assurance (QA) will communicate any positive results from sterility testing to the physician. Report the occurrence of transmitted infection to Gamida Cell at (844) 477-7478.

Transmission of Rare Genetic Diseases
OMISIRGE may transmit rare genetic diseases involving the hematopoietic system because it is derived from umbilical cord blood. Cord blood donors have been screened to exclude donors with sickle cell anemia, and anemias due to abnormalities in hemoglobins C, D, and E. Because of the age of the donor at the time cord blood collection takes place, the ability to exclude rare genetic diseases is severely limited. Report the occurrence of transmitted rare genetic disease to Gamida Cell at (844) 477-7478.

Hematological malignancies: The most common adverse reactions (incidence > 20%) are infections, GvHD, and infusion and hypersensitivity reactions.

SAA: The most common adverse reactions (incidence > 20%) are infections, hyperglycemia, skin rash, febrile neutropenia, immune thrombocytopenia, acute kidney injury, acute GvHD, hypertension, hypoxia, and infusion related reactions.

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