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Busulfan Injection is indicated for use in combination with cyclophosphamide as a conditioning regimen prior to allogeneic hematopoietic progenitor cell transplantation for chronic myelogenous leukemia. Busulfan Injection is an alkylating drug indicated for: Use in combination with cyclophosphamide as a conditioning regimen prior to allogeneic hematopoietic progenitor cell transplantation for chronic myelogenous leukemia (CML) ( 1 )

Busulfan Injection is contraindicated in patients with a history of hypersensitivity to any of its components. Busulfan Injection is contraindicated in patients with a history of hypersensitivity to any of its components ( 4 )

Seizures: Initiate anticonvulsant prophylactic therapy prior to treatment with Busulfan Injection. Monitor patients with history of seizure disorder, head trauma or receiving epileptogenic drugs ( 5.2 ) Hepatic Veno-Occlusive Disease (HVOD): Increased risk of developing HVOD at AUC greater than 1,500 μM•min. Monitor serum transaminases, alkaline phosphatase and bilirubin daily ( 5.3 ) Embryo-fetal Toxicity: Can cause fetal harm. Advise of potential risk to a fetus and use of effective contraception ( 5.4 , 8.1 , 8.3 ) Cardiac tamponade has been reported in pediatric patients with thalassemia who received high doses of oral busulfan and cyclophosphamide. Abdominal pain and vomiting preceded the tamponade in most patients ( 5.5 ) 5.1 Myelosuppression The most frequent serious consequence of treatment with Busulfan Injection at the recommended dose and schedule is prolonged myelosuppression, occurring in all patients (100%). Severe granulocytopenia, thrombocytopenia, anemia, or any combination thereof may develop. Hematopoietic progenitor cell transplantation is required to prevent potentially fatal complications of the prolonged myelosuppression. Monitor complete blood counts, including white blood cell differentials, and quantitative platelet counts daily during treatment and until engraftment is demonstrated. Absolute neutrophil counts dropped below 0.5 x 10 9 /L at a median of 4 days post-transplant in 100% of patients treated in the Busulfan Injection clinical trial. The …

8.1 Pregnancy Risk Summary Busulfan can cause fetal harm when administered to a pregnant woman based on animal data. Busulfan was teratogenic in mice, rats, and rabbits following administration during organogenesis. The solvent, DMA, may also cause fetal harm when administered to a pregnant woman. In rats, DMA doses of approximately 40% of the daily dose of DMA in the Busulfan Injection dose on a mg/m 2 basis given during organogenesis caused significant developmental anomalies (see Data ) . There are no available human data informing the drug-associated risk. Advise pregnant women of the potential risk to a fetus. The background risk of major birth defects and miscarriage for the indicated …