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adverse reactions
6 ADVERSE REACTIONS The following adverse reactions are discussed in more detail in other sections of the labeling: Myelosuppression [see Warnings and Precautions ( 5.1 )] Seizures [see Warnings and Precautions ( 5.2 )] Hepatic Veno-Occlusive Disease (HVOD) [see Warnings and Precautions ( 5.3 )] Embryo-fetal Toxicity [see Warnings and Precautions ( 5.4 )] Cardiac Tamponade [see Warnings and Precautions ( 5.5 )] Bronchopulmonary Dysplasia [see Warnings and Precautions ( 5.6 )] Cellular Dysplasia [see Warnings and Precautions ( 5.7 )] Most common adverse reactions (incidence > 60%) were: myelosuppression, nausea, stomatitis, vomiting, anorexia, diarrhea, insomnia, fever, hypomagnesemia, abdominal pain, anxiety, headache, hyperglycemia and hypokalemia ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Sagent Pharmaceuticals at 1-866-625-1618 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. Adverse reaction information is primarily derived from the clinical study (N = 61) of Busulfan Injection and the data obtained for high-dose oral busulfan conditioning in the setting of randomized, controlled trials identified through a literature review. In the Busulfan Injection allogeneic stem cell transplantation clinical trial, all patients were treated with Busulfan Injection 0.8 mg per kg as a two-hour infusion every six hours for 16 doses over four days, combined with cyclophosphamide 60 mg per kg x 2 days. Ninety-three percent (93%) of evaluable patients receiving this dose of Busulfan Injection maintained an AUC less than 1,500 μM•min for dose 9, which has generally been considered the level that minimizes the risk of HVOD. Table 1 lists the non-hematologic adverse reactions events through Bone Marrow Transplantation (BMT) Day +28 at a rate greater than or equal to 20% in patients treated with Busulfan Injection prior to allogeneic hematopoietic cell transplantation. Table 1: Summary of the Incidence (greater than or equal to 20%) of Non-Hematologic Adverse Reactions through BMT Day +28 in Patients who Received Busulfan Injection Prior to Allogeneic Hematopoietic Progenitor Cell Transplantation 1. Includes all reported adverse reactions regardless of severity (toxicity grades 1 to 4) Non-Hematological Adverse Reactions 1 Percent Incidence BODY AS A WHOLE Fever Headache Asthenia Chills Pain Edema General Allergic Reaction Chest Pain Inflammation at Injection Site Back Pain 80 69 51 46 44 28 26 26 25 23 CARDIOVASCULAR SYSTEM Tachycardia Hypertension Thrombosis Vasodilation 44 36 33 25 DIGESTIVE SYSTEM Nausea Stomatitis (Mucositis) Vomiting Anorexia Diarrhea Abdominal Pain Dyspepsia Constipation Dry Mouth Rectal Disorder Abdominal Enlargement 98 97 95 85 84 72 44 38 26 25 23 METABOLIC AND NUTRITIONAL SYSTEM Hypomagnesemia Hyperglycemia Hypokalemia Hypocalcemia Hyperbilirubinemia Edema SGPT Elevation Creatinine Increased 77 66 64 49 49 36 31 21 NERVOUS SYSTEM Insomnia Anxiety Dizziness Depression 84 72 30 23 RESPIRATORY SYSTEM Rhinitis Lung Disorder Cough Epistaxis Dyspnea 44 34 28 25 25 SKIN AND APPENDAGES Rash Pruritus 57 28 Additional Adverse Reactions by Body System Hematologic: Prolonged prothrombin time Gastrointestinal: Esophagitis, ileus, hematemesis, pancreatitis, rectal discomfort Hepatic: Alkaline phosphatase increases, jaundice, hepatomegaly Graft-versus-host disease: Graft-versus-host disease. There were 3 deaths (5%) attributed to GVHD. Edema: Hypervolemia, or documented weight increase Infection: Infection, pneumonia (fatal in one patient and life-threatening in 3% of patients) Cardiovascular: Arrhythmia, atrial fibrillation, ventricular extrasystoles, third degree heart block, thrombosis (all episodes were associated with the central venous catheter), hypotension, flushing and hot flashes, cardiomegaly, ECG abnormality, left-sided heart failure, and pericardial effusion Pulmonary: Hyperventilation, alveolar hemorrhage (fatal in 3%), pharyngitis, hiccup, asthma, atelectasis, pleural effusion, hypoxia, hemoptysis, sinusitis, and interstitial fibrosis (fatal in a single case) Neurologic: Cerebral hemorrhage, coma, delirium, agitation, encephalopathy, confusion, hallucinations, lethargy, somnolence Renal: BUN increased, dysuria, oliguria, hematuria, hemorrhagic cystitis Skin: Alopecia, vesicular rash, maculopapular rash, vesiculo-bullous rash, exfoliative dermatitis, erythema nodosum, acne, skin discoloration Metabolic: Hypophosphatemia, hyponatremia Other Events: Injection site pain, myalgia, arthralgia, ear disorder 6.2 Postmarketing Experience Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. The following adverse reactions have been identified during post-approval use of Busulfan Injection: Blood and Lymphatic System Disorders : febrile neutropenia Gastrointestinal Disorders : tooth hypoplasia Metabolism and Nutrition Disorders : tumor lysis syndrome Vascular Disorders : thrombotic microangiopathy (TMA) Infections and Infestations : severe bacterial, viral (e.g., cytomegalovirus viremia) and fungal infections; and sepsis. 6.3 Oral Busulfan Literature Review A literature review identified four randomized, controlled trials that evaluated a high-dose oral busulfan-containing conditioning regimen for allogeneic bone marrow transplantation in the setting of CML [see Clinical Studies ( 14 )] . The safety outcomes reported in those trials are summarized in Table 2 below for a mixed population of hematological malignancies (AML, CML, and ALL). Table 2: Summary of safety analyses from the randomized, controlled trials utilizing a high dose oral busulfan-containing conditioning regimen that were identified in a literature review. 1. TRM = Transplantation Related Mortality 2. VOD = Veno-Occlusive Disease of the liver 3. GVHD = Graft versus Host Disease Clift CML Chronic Phase TRM 1 VOD 2 GVHD 3 Pulmonary Hemorrhagic Cystitis Seizure Death ≤ 100d = 4.1% (3/73) No Report Acute ≥ Grade 2 = 35% Chronic = 41% (30/73) 1 death from Idiopathic Interstitial Pneumonitis And 1 death from Pulmonary Fibrosis No Report No Report Devergie CML Chronic Phase TRM VOD GVHD Pulmonary Hemorrhagic Cystitis Seizure 38% 7.7% (5/65) Deaths = 4.6% (3/65) Acute ≥ Grade 2 = 41% (24/59 at risk) Interstitial Pneumonitis = 16.9% (11/65) 10.8% (7/65) No Report Ringden CML, AML, ALL TRM VOD GVHD Pulmonary Hemorrhagic Cystitis Seizure 28% 12% Acute ≥ Grade 2 GVHD = 26% Chronic GVHD = 45% Interstitial Pneumonitis = 14% 24% 6% Blume CML, AML, ALL TRM VOD GVHD Pulmonary Hemorrhagic Cystitis Seizure No Report Deaths = 4.9% Acute ≥ Grade 2 GVHD = 22% (13/58 at risk) Chronic GVHD = 31% (14/45 at risk) No Report No Report No Report