MITOXANTRONE

Mitoxantrone Injection, USP (concentrate) is a synthetic antineoplastic anthracenedione for intravenous use. The molecular formula is C 22 H 28 N 4 O 6 ∙2HCl and the molecular weight is 517.41. It is supplied as a concentrate that MUST BE DILUTED PRIOR TO INJECTION. The concentrate is a sterile, nonpyrogenic, dark blue aqueous solution containing mitoxantrone hydrochloride equivalent to 2 mg/mL mitoxantrone free base, with sodium chloride (0.80% w/v), sodium metabisulfite (0.01% w/v), sodium acetate (0.005% w/v), acetic acid (0.046% w/v), and Water for Injection, USP as inactive ingredients. The solution has a pH of 3.0 to 4.5 and contains 0.14 mEq of sodium per mL. The product does not contain preservatives. The chemical name is 1, 4-dihydroxy-5, 8-bis[[2-[(2-hydroxyethyl) amino]ethyl]amino]-9,10- anthracenedione dihydrochloride and the structural formula is: Chemical Structure

Mitoxantrone is indicated for reducing neurologic disability and/or the frequency of clinical relapses in patients with secondary (chronic) progressive, progressive relapsing, or worsening relapsing-remitting multiple sclerosis (i.e., patients whose neurologic status is significantly abnormal between relapses). Mitoxantrone is not indicated in the treatment of patients with primary progressive multiple sclerosis. The clinical patterns of multiple sclerosis in the studies were characterized as follows: secondary progressive and progressive relapsing disease were characterized by gradual increasing disability with or without superimposed clinical relapses, and worsening relapsing-remitting disease was characterized by clinical relapses resulting in a step-wise worsening of disability. Mitoxantrone in combination with corticosteroids is indicated as initial chemotherapy for the treatment of patients with pain related to advanced hormone-refractory prostate cancer. Mitoxantrone in combination with other approved drug(s) is indicated in the initial therapy of acute nonlymphocytic leukemia (ANLL) in adults. This category includes myelogenous, promyelocytic, monocytic, and erythroid acute leukemias.

( See also WARNINGS ) Multiple Sclerosis The recommended dosage of mitoxantrone is 12 mg/m 2 given as a short (approximately 5 to 15 minutes) intravenous infusion every 3 months. Left ventricular ejection fraction (LVEF) should be evaluated by echocardiogram or MUGA prior to administration of the initial dose of mitoxantrone and all subsequent doses. In addition, LVEF evaluations are recommended if signs or symptoms of congestive heart failure develop at any time during treatment with mitoxantrone. Mitoxantrone should not be administered to multiple sclerosis patients with an LVEF <50%, with a clinically significant reduction in LVEF, or to those who have received a cumulative lifetime dose of ≥140 mg/m 2 . Complete blood counts, including platelets, should be monitored prior to each course of mitoxantrone and in the event that signs or symptoms of infection develop. Mitoxantrone generally should not be administered to multiple sclerosis patients with neutrophil counts less than 1500 cells/mm 3 . Liver function tests should also be monitored prior to each course. Mitoxantrone therapy in multiple sclerosis patients with abnormal liver function tests is not recommended because mitoxantrone clearance is reduced by hepatic impairment and no laboratory measurement can predict drug clearance and dose adjustments. Women with multiple sclerosis who are biologically capable of becoming pregnant, even if they are using birth control, should have a pregnancy test, and the results should be known, before receiving each dose of mitoxantrone (see WARNINGS, Pregnancy ). Hormone-Refractory Prostate Cancer Based on data from two Phase 3 comparative trials of mitoxantrone plus corticosteroids versus corticosteroids alone, the recommended dosage of mitoxantrone is 12 to 14 mg/m 2 given as a short intravenous infusion every 21 days. Combination Initial Therapy for ANLL in Adults For induction, the recommended dosage is 12 mg/m 2 of mitoxantrone daily on Days 1 to 3 given as an intravenous infusion, and 100 mg/m 2 of cytarabine for 7 days given as a continuous 24-hour infusion on Days 1 to 7. Most complete remissions will occur following the initial course of induction therapy. In the event of an incomplete antileukemic response, a second induction course may be given. Mitoxantrone should be given for 2 days and cytarabine for 5 days using the same daily dosage levels. If severe or life-threatening nonhematologic toxicity is observed during the first induction course, the second induction course should be withheld until toxicity resolves. Consolidation therapy which was used in two large randomized multicenter trials consisted of mitoxantrone, 12 mg/m 2 given by intravenous infusion daily on Days 1 and 2 and cytarabine, 100 mg/m 2 for 5 days given as a continuous 24-hour infusion on Days 1 to 5. The first course was given approximately 6 weeks after the final induction course; the second was generally administered 4 weeks after the first. Severe myelosuppression occurred. (See CLINICAL PHARMACOLOGY ) Hepatic Impairment For patients with hepatic impairment, there is at present no laboratory measurement that allows for dose adjustment recommendations. (See CLINICAL PHARMACOLOGY, Special Populations, Hepatic Impairment ) Preparation and Administration Precautions MITOXANTRONE INJECTION, USP (CONCENTRATE) MUST BE DILUTED PRIOR TO USE. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration whenever solution and container permit. The dose of mitoxantrone should be diluted to at least 50 mL with either 0.9% Sodium Chloride Injection (USP) or 5% Dextrose Injection (USP). Mitoxantrone Injection, USP (concentrate) may be further diluted into Dextrose 5% in Water, Normal Saline or Dextrose 5% with Normal Saline and used immediately. DO NOT FREEZE. Mitoxantrone should not be mixed in the same infusion as heparin since a precipitate may form. Because specific compatibility data are not available, it is recommended that mitoxantrone not be mixed in the same infusion with other drugs. The diluted solution should be introduced slowly into the tubing as a freely running intravenous infusion of 0.9% Sodium Chloride Injection (USP) or 5% Dextrose Injection (USP) over a period of not less than 3 minutes. Unused infusion solutions should be discarded immediately in an appropriate fashion. In the case of multiple-dose use, after penetration of the stopper, the remaining portion of the undiluted Mitoxantrone Injection, USP concentrate should be stored not longer than 7 days between 15° to 25°C (59° to 77°F) or 14 days under refrigeration. DO NOT FREEZE. CONTAINS NO PRESERVATIVE. Care in the administration of mitoxantrone will reduce the chance of extravasation. Mitoxantrone should be administered into the tubing of a freely running intravenous infusion of 0.9% Sodium Chloride Injection, USP or 5% Dextrose Injection, USP. The tubing should be attached to a Butterfly needle or other suitable device and inserted preferably into a large vein. If possible, avoid veins over joints or in extremities with compromised venous or lymphatic drainage. Care should be taken to avoid extravasation at the infusion site and to avoid contact of mitoxantrone with the skin, mucous membranes, or eyes. MITOXANTRONE SHOULD NOT BE ADMINISTERED SUBCUTANEOUSLY. If any signs or symptoms of extravasation have occurred, including burning, pain, pruritis, erythema, swelling, blue discoloration, or ulceration, the injection or infusion should be immediately terminated and restarted in another vein. During intravenous administration of mitoxantrone extravasation may occur with or without an accompanying stinging or burning sensation even if blood returns well on aspiration of the infusion needle. If it is known or suspected that subcutaneous extravasation has occurred, it is recommended that intermittent ice packs be placed over the area of extravasation and that the affected extremity be elevated. Because of the progressive nature of extravasation reactions, the area of injection should be frequently examined and surgery consultation obtained early if there is any sign of a local reaction. Skin accidentally exposed to mitoxantrone should be rinsed copiously with warm water and if the eyes are involved, standard irrigation techniques should be used immediately. The use of goggles, gloves, and protective gowns is recommended during preparation and administration of the drug. Procedures for proper handling and disposal of anticancer drugs should be considered. Several guidelines on this subject have been published. 1–4 There is no general agreement that all of the procedures recommended in the guidelines are necessary or appropriate.

Mitoxantrone is contraindicated in patients who have demonstrated prior hypersensitivity to it.

Multiple Sclerosis Mitoxantrone has been administered to 149 patients with multiple sclerosis in two randomized clinical trials, including 21 patients who received mitoxantrone in combination with corticosteroids. In Study 1, the proportion of patients who discontinued treatment due to an adverse event was 9.7% (n = 6) in the 12 mg/m 2 mitoxantrone arm (leukopenia, depression, decreased LV function, bone pain and emesis, renal failure, and one discontinuation to prevent future complications from repeated urinary tract infections) compared to 3.1% (n = 2) in the placebo arm (hepatitis and myocardial infarction). The following clinical adverse experiences were significantly more frequent in the mitoxantrone groups: nausea, alopecia, urinary tract infection, and menstrual disorders, including amenorrhea. Table 4a summarizes clinical adverse events of all intensities occurring in ≥5% of patients in either dose group of mitoxantrone and that were numerically greater on drug than on placebo in Study 1. The majority of these events were of mild to moderate intensity, and nausea was the only adverse event that occurred with severe intensity in more than one patient (three patients [5%] in the 12 mg/m 2 group). Of note, alopecia consisted of mild hair thinning. Two of the 127 patients treated with mitoxantrone in Study 1 had decreased LVEF to below 50% at some point during the 2 years of treatment. An additional patient receiving 12 mg/m 2 did not have LVEF measured, but had another echocardiographic measure of ventricular function (fractional shortening) that led to discontinuation from the study. Table 4a: Adverse Events of Any Intensity Occurring in ≥ 5% of Patients on Any Dose of Mitoxantrone and That Were Numerically Greater Than in the Placebo Group Study 1 Percent of Patients Preferred Term Placebo (N = 64) 5 mg/m 2 Mitoxantrone (N = 65) 12 mg/m 2 Mitoxantrone (N = 62) Nausea 20 55 76 Alopecia 31 38 61 Menstrual disorder Percentage of female patients. 26 51 61 Amenorrhea 3 28 43 Upper respiratory tract infection 52 51 53 Urinary tract infection 13 29 32 Stomatitis 8 15 19 Arrhythmia 8 6 18 Diarrhea 11 25 16 Urine abnormal 6 5 11 ECG abnormal 3 5 11 Constipation 6 14 10 Back pain 5 6 8 Sinusitis 2 3 6 Headache 5 6 6 The proportion of patients experiencing any infection during Study 1 was 67% for the placebo group, 85% for the 5 mg/m 2 group, and 81% for the 12 mg/m 2 group. However, few of these infections required hospitalization: one placebo patient (tonsillitis), three 5 mg/m 2 patients (enteritis, urinary tract infection, viral infection), and four 12 mg/m 2 patients (tonsillitis, urinary tract infection [two], endometritis). Table 4b summarizes laboratory abnormalities that occurred in ≥ 5% of patients in either mitoxantrone dose group, and that were numerically more frequent than in the placebo group. Table 4b: Laboratory Abnormalities Occurring in ≥ 5% of Patients Assessed using World Health Organization (WHO) toxicity criteria. on Either Dose of Mitoxantrone and That Were More Frequent Than in the Placebo Group Study 1 Percent of Patients Event Placebo (N = 64) 5 mg/m 2 Mitoxantrone (N = 65) 12 mg/m 2 Mitoxantrone (N = 62) Leukopenia < 4000 cells/mm 3 0 9 19 Gamma-GT increased 3 3 15 SGOT increased 8 9 8 Granulocytopenia < 2000 cells/mm 3 2 6 6 Anemia 2 9 6 SGPT increased 3 6 5 There was no difference among treatment groups in the incidence or severity of hemorrhagic events. In Study 2, mitoxantrone was administered once a month. Clinical adverse events most frequently reported in the mitoxantrone group included amenorrhea (53% of female patients), alopecia (33% of patients), nausea (29% of patients), and asthenia (24% of patients). Tables 5a and 5b respectively summarize adverse events and laboratory abnormalities occurring in > 5% of patients in the mitoxantrone group and numerically more frequent than in the control group. Table 5a: Adverse Events of Any Intensity Occurring in > 5% of Patients Assessed using National Cancer Institute (NCI) common toxicity criteria. in the Mitoxantrone Group and Numerically More Frequent Than in the Control Group Study 2 Percent of Patients Event MP (N = 21) M + MP (N = 21) M = mitoxantrone, MP = methylprednisolone Amenorrhea Percentage of female patients. 0 53 Alopecia 0 33 Nausea 0 29 Asthenia 0 24 Pharyngitis/throat infection 5 19 Gastralgia/stomach burn/epigastric pain 5 14 Aphthosis 0 10 Cutaneous mycosis 0 10 Rhinitis 0 10 Menorrhagia 0 7 Table 5b: Laboratory Abnormalities Occurring in > 5% of Patients Assessed using National Cancer Institute (NCI) common toxicity criteria. in the Mitoxantrone Group and Numerically More Frequent Than in the Control Group Study 2 Percent of Patients Event MP (N = 21) M + MP (N = 21) M = mitoxantrone, MP = methylprednisolone WBC low < 4000 cells/mm 3 14 100 ANC low < 1500 cells/mm 3 10 100 Lymphocytes low 43 95 Hemoglobin low 48 43 Platelets low < 100,000 cells/mm 3 0 33 SGOT high 5 15 SGPT high 10 15 Glucose high 5 10 Potassium low 0 10 Leukopenia and neutropenia were reported in the M + MP group (see Table 5b ). Neutropenia occurred within 3 weeks after mitoxantrone administration and was always reversible. Only mild to moderate intensity infections were reported in 9 of 21 patients in the M + MP group and in 3 of 21 patients in the MP group; none of these required hospitalization. There was no difference among treatment groups in the incidence or severity of hemorrhagic events. There were no withdrawals from Study 2 for safety reasons. Leukemia Mitoxantrone has been studied in approximately 600 patients with acute non-lymphocytic leukemia (ANLL). Table 6 represents the adverse reaction experience in the large U.S. comparative study of mitoxantrone + cytarabine vs daunorubicin + cytarabine. Experience in the large international study was similar. A much wider experience in a variety of other tumor types revealed no additional important reactions other than cardiomyopathy (see WARNINGS ). It should be appreciated that the listed adverse reaction categories include overlapping clinical symptoms related to the same condition, e.g., dyspnea, cough and pneumonia. In addition, the listed adverse reactions cannot all necessarily be attributed to chemotherapy as it is often impossible to distinguish effects of the drug and effects of the underlying disease. It is clear, however, that the combination of mitoxantrone + cytarabine was responsible for nausea and vomiting, alopecia, mucositis/stomatitis, and myelosuppression. Table 6 summarizes adverse reactions occurring in patients treated with mitoxantrone + cytarabine in comparison with those who received daunorubicin + cytarabine for therapy of ANLL in a large multicenter randomized prospective U.S. trial. Adverse reactions are presented as major categories and selected examples of clinically significant subcategories. Table 6: Adverse Events Occurring in ANLL Patients Receiving Mitoxantrone or Daunorubicin Induction [% pts entering induction] Consolidation [% pts entering induction] Event MIT N = 102 DAUN N = 102 MIT N = 55 DAUN N = 49 MIT = mitoxantrone, DAUN = daunorubicin. Cardiovascular 26 28 11 24 CHF 5 6 0 0 Arrhythmias 3 3 4 4 Bleeding 37 41 20 6 GI 16 12 2 2 Petechiae/ecchymoses 7 9 11 2 Gastrointestinal 88 85 58 51 Nausea/vomiting 72 67 31 31 Diarrhea 47 47 18 8 Abdominal pain 15 9 9 4 Mucositis/stomatitis 29 33 18 8 Hepatic 10 11 14 2 Jaundice 3 8 7 0 Infections 66 73 60 43 UTI 7 2 7 2 Pneumonia 9 7 9 0 Sepsis 34 36 31 18 Fungal infections 15 13 9 6 Renal failure 8 6 0 2 Fever 78 71 24 18 Alopecia 37 40 22 16 Pulmonary 43 43 24 14 Cough 13 9 9 2 Dyspnea 18 20 6 0 CNS 30 30 34 35 Seizures 4 4 2 8 Headache 10 9 13 8 Eye 7 6 2 4 Conjunctivitis 5 1 0 0 Hormone-Refractory Prostate Cancer Detailed safety information is available for a total of 353 patients with hormone-refractory prostate cancer treated with mitoxantrone, including 274 patients who received mitoxantrone in combination with corticosteroids. Table 7 summarizes adverse reactions of all grades occurring in ≥5% of patients in Trial CCI-NOV22. Table 7: Adverse Events of Any Intensity Occurring in ≥5% of Patients Trial CCI-NOV22 Event M + P (n = 80) % P (n = 81) % M = mitoxantrone, P = prednisone. No nonhematologic adverse events of Grade 3/4 were seen in > 5% of patients. Nausea 61 35 Fatigue 39 14 Alopecia 29 0 Anorexia 25 6 Constipation 16 14 Dyspnea 11 5 Nail bed changes 11 0 Edema 10 4 Systemic infection 10 7 Mucositis 10 0 UTI 9 4 Emesis 9 5 Pain 8 9 Fever 6 3 Hemorrhage/bruise 6 1 Anemia 5 3 Cough 5 0 Decreased LVEF 5 0 Anxiety/depression 5 3 Dyspepsia 5 6 Skin infection 5 3 Blurred vision 3 5 Table 8 summarizes adverse events of all grades occurring in ≥ 5% of patients in Trial CALGB 9182. Table 8: Adverse Events of Any Intensity Occurring in ≥ 5% of Patients. Trial CALGB 9182 M + H (n = 112) H (n = 113) Event n % n % M = mitoxantrone, H = hydrocortisone Decreased WBC 96 87 4 4 Abnormal granulocytes/bands 88 79 3 3 Decreased hemoglobin 83 75 42 39 Abnormal lymphocytes count 78 72 27 25 Pain 45 41 44 39 Abnormal platelet count 43 39 8 7 Abnormal alkaline phosphatase 41 37 42 38 Malaise/fatigue 37 34 16 14 Hyperglycemia 33 31 32 30 Edema 31 30 15 14 Nausea 28 26 9 8 Anorexia 24 22 16 14 Abnormal BUN 24 22 22 20 Abnormal transaminase 22 20 16 14 Alopecia 20 20 1 1 Abnormal cardiac function 19 18 0 0 Infection 18 17 4 4 Weight loss 18 17 13 12 Dyspnea 16 15 9 8 Diarrhea 16 14 4 4 Fever in absence of infection 15 14 7 6 Weight gain 15 14 16 15 Abnormal creatinine 14 13 11 10 Other gastrointestinal 13 14 11 11 Vomiting 12 11 6 5 Other neurologic 11 11 5 5 Hypocalcemia 10 10 5 5 Hematuria 9 11 5 6 Hyponatremia 9 9 3 3 Sweats 9 9 2 2 Other liver 8 8 8 8 Stomatitis 8 8 1 1 Cardiac dysrhythmia 7 7 3 3 Hypokalemia 7 7 4 4 Neuro/constipation 7 7 2 2 Neuro/motor disorder 7 7 3 3 Neuro/mood disorder 6 6 2 2 Skin disorder 6 6 4 4 Cardiac ischemia 5 5 1 1 Chills 5 5 0 0 Hemorrhage 5 5 3 3 Myalgias/arthralgias 5 5 3 3 Other kidney/bladder 5 5 3 3 Other endocrine 5 6 3 4 Other pulmonary 5 5 3 3 Hypertension 4 4 5 5 Impotence/libido 4 7 2 3 Proteinuria 4 6 2 3 Sterility 3 5 2 3 General Allergic Reaction Hypotension, urticaria, dyspnea, and rashes have been reported occasionally. Anaphylaxis/anaphylactoid reactions have been reported rarely. Cutaneous Extravasation at the infusion site has been reported, which may result in erythema, swelling, pain, burning, and/or blue discoloration of the skin. Extravasation can result in tissue necrosis with resultant need for debridement and skin grafting. Phlebitis has also been reported at the site of the infusion. Hematologic Topoisomerase II inhibitors, including mitoxantrone, in combination with other antineoplastic agents or alone, have been associated with the development of acute leukemia (see WARNINGS ). Leukemia Myelosuppression is rapid in onset and is consistent with the requirement to produce significant marrow hypoplasia in order to achieve a response in acute leukemia. The incidences of infection and bleeding seen in the U.S. trial are consistent with those reported for other standard induction regimens. Hormone-Refractory Prostate Cancer In a randomized study where dose escalation was required for neutrophil counts greater than 1000/mm 3 , Grade 4 neutropenia (ANC < 500/mm 3 ) was observed in 54% of patients treated with mitoxantrone + low-dose prednisone. In a separate randomized trial where patients were treated with 14 mg/m 2 , Grade 4 neutropenia in 23% of patients treated with mitoxantrone + hydrocortisone was observed. Neutropenic fever/infection occurred in 11% and 10% of patients receiving mitoxantrone + corticosteroids, respectively, on the two trials. Platelets < 50,000/mm 3 were noted in 4% and 3% of patients receiving mitoxantrone + corticosteroids on these trials, and there was one patient death on mitoxantrone + hydrocortisone due to intracranial hemorrhage after a fall. Gastrointestinal Nausea and vomiting occurred acutely in most patients and may have contributed to reports of dehydration, but were generally mild to moderate and could be controlled through the use of antiemetics. Stomatitis/mucositis occurred within 1 week of therapy. Cardiovascular Congestive heart failure, tachycardia, EKG changes including arrhythmias, chest pain, and asymptomatic decreases in left ventricular ejection fraction have occurred. (See WARNINGS ) Pulmonary Interstitial pneumonitis has been reported in cancer patients receiving combination chemotherapy that included mitoxantrone.

Mitoxantrone and its metabolites are excreted in bile and urine, but it is not known whether the metabolic or excretory pathways are saturable, may be inhibited or induced, or if mitoxantrone and its metabolites undergo enterohepatic circulation. To date, post-marketing experience has not revealed any significant drug interactions in patients who have received mitoxantrone for treatment of cancer. Information on drug interactions in patients with multiple sclerosis is limited. Following concurrent administration of mitoxantrone with corticosteroids, no evidence of drug interactions has been observed.

Mitoxantrone Injection, USP (concentrate) should be stored between 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature]. DO NOT FREEZE. Store Upright.