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Adverse Reactions in ≥ 10% of Patients Receiving 12 mcg/kg of ELZONRIS (Cont’d) N=94 All Grades % Grade ≥ 3 % Dyspnea 19 2 Cough 14 0 Epistaxis 14 1 Oropharyngeal pain 12 0 Respiratory, thoracic and mediastinal disorders Psychiatric disorders Insomnia 17 0 Anxiety 15 0 Confusional state 11 0 17 0 Petechiae 10 0 Pruritus 10 0 10 0 Cardiac disorders Tachycardia Skin and subcutaneous tissue disorders Renal and urinary disorders Hematuria Capillary leak syndrome defined as any event reported as CLS during treatment with ELZONRIS or the occurrence of at least 2 of the following CLS manifestations within 7 days of each other: hypoalbuminemia (including albumin value less than 3.0 g/dL), edema (including weight increase of 5 kg or more), hypotension (including systolic blood pressure less than 90 mmHg). 1 Table below summarizes the clinically-important laboratory abnormalities that occurred in ≥ 10% patients with myeloid malignancies treated with ELZONRIS. Selected Laboratory Abnormalities in Patients Receiving 12 mcg/kg of ELZONRIS Treatment-Emergent Laboratory Abnormalities All Grades % Grade ≥ 3 % Hematology Platelets decrease 67 53 Hemoglobin decrease 60 35 Neutrophils decrease 37 31 Chemistry Glucose increase 87 20 ALT increase 82 30 AST increase 79 37 Albumin decrease 77 0 Calcium decrease 57 2 10 Sodium decrease 50 Potassium decrease 39 4 Phosphate decrease 30 11 Creatinine increase 27 0 Alkaline phosphatase increase 26 1 Potassium increase 21 2 Magnesium decrease 20 0 Magnesium increase 14 3 Bilirubin increase 14 0 Glucose decrease 11 0 Sodium increase 10 0 DRUG INTERACTIONS No drug-drug interaction studies have been conducted with ELZONRIS. USE IN SPECIFIC POPULATIONS Pregnancy Risk Summary Based on its mechanism of action, ELZONRIS has the potential for adverse effects on embryo-fetal development. There are no available data on ELZONRIS use in pregnant women to inform a drug-associated risk of adverse developmental outcomes. Animal reproduction or developmental toxicity studies have not been conducted with tagraxofusp-erzs. Advise pregnant women of the potential risk to the fetus. The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a risk of birth defect, loss, or other adverse outcomes. In the US general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4%, and 15% to 20%, respectively. Lactation Risk Summary No data are available regarding the presence of ELZONRIS in human milk, the effects on the breastfed child, or the effects on milk production. Because of the potential for serious adverse reactions in breastfed children from ELZONRIS, breast feeding is not recommended during treatment and for 1 week after the last dose. Females and Males of Reproductive Potential Based on its mechanism of action, ELZONRIS may cause fetal harm when administered to a pregnant woman. Pregnancy Testing Conduct pregnancy testing in females of reproductive potential within 7 days prior to initiating ELZONRIS treatment. Contraception Advise females to use acceptable contraceptive methods during ELZONRIS treatment and for at least 1 week after the last dose of ELZONRIS. Pediatric Use The safety and effectiveness of ELZONRIS for treatment of BPDCN have been established in pediatric patients 2 years of age and older (no data for pediatric patients less than 2 years of age). Use of ELZONRIS in these age groups is supported by evidence from an adequate and well-controlled study of ELZONRIS in adults with BPDCN and additional safety data from three pediatric patients with BPDCN, including 1 child (2 years to < 12 years old) and 2 adolescents (12 years to < 17 years old), treated with ELZONRIS at the recommended dosage. The safety profile of ELZONRIS in the pediatric patients was similar to that seen in the adults. Efficacy for pediatric patients is extrapolated from the results of STML-401-0114. Geriatric Use Of the 94 patients who received ELZONRIS at the labeled dose in STML-401-0114, 23% were 75 years and older. The older patients experienced a higher incidence of altered mental status (including confusional state, delirium, mental status changes, dementia, and encephalopathy) than younger patients. PATIENT COUNSELING INFORMATION Capillary Leak Syndrome Advise patients of the risk of capillary leak syndrome (CLS), and to contact their health care professional for signs and symptoms associated with CLS including new or worsening edema, weight gain, shortness of breath, and/or hypotension after infusion. Advise patients to weigh themselves daily [see Warnings and Precautions]. Hypersensitivity Advise patients of the risk of hypersensitivity reactions, and to contact their healthcare professional for signs and symptoms associated with hypersensitivity reactions including rash, flushing, wheezing and swelling of the face [see Warnings and Precautions]. Hepatic Toxicity Advise patients to report symptoms that may indicate elevated liver enzymes including fatigue, anorexia and/or right upper abdominal discomfort [see Warnings and Precautions]. Contraception Advise females to avoid pregnancy and to use acceptable contraceptive methods during ELZONRIS treatment and for at least 1 week after the last dose of ELZONRIS Lactation Advise women not to breastfeed [see Use in Specific Populations]. For more detailed information please see full Prescribing Information, including Boxed WARNING. To report adverse events, please contact Stemline Therapeutics, Inc. at 1-877-332-7961 or you may report to the FDA at 1-800-FDA-1088 or visit www.fda.gov/medwatch. Marketed and Distributed by: Stemline Therapeutics, Inc. New York, NY 10022 www.stemline.com US License No. 2088 US-ELZ-1900004