Topotecan Injection is indicated for the treatment of: small cell lung cancer sensitive disease after failure of first-line chemotherapy. In clinical studies submitted to support approval, sensitive disease was defined as disease responding to chemotherapy but subsequently progressing at least 60 days (in the Phase 3 study) or at least 90 days (in the Phase 2 studies) after chemotherapy [see Clinical Studies ( 14 ) ] .
Topotecan Injection in combination with cisplatin is indicated for the treatment of: stage IV-B, recurrent, or persistent carcinoma of the cervix which is not amenable to curative treatment with surgery and/or radiation therapy. Topotecan is a topoisomerase inhibitor indicated for: small cell lung cancer sensitive disease after failure of first-line chemotherapy. ( 1 ) combination therapy with cisplatin for stage IV-B, recurrent, or persistent carcinoma of the cervix which is not amenable to curative treatment with surgery and/or radiation therapy.
( 1 )
Contraindications
Topotecan Injection is contraindicated in patients who have a history of severe hypersensitivity reactions (e.g., anaphylactoid reactions) to topotecan or to any of its ingredients. Topotecan Injection should not be used in patients with severe bone marrow depression. History of severe hypersensitivity reactions (e.g., anaphylactoid reactions) to topotecan or any of its ingredients ( 4 ) Severe bone marrow depression ( 4 )
Warnings and precautions
Bone marrow suppression: Administer Topotecan Injection only to patients with adequate bone marrow reserves. Monitor peripheral blood counts and adjust the dose if needed. ( 5.1 ) Topotecan-induced neutropenia can lead to neutropenic colitis. ( 5.2 ) Interstitial lung disease: topotecan has been associated with reports of interstitial lung disease. Monitor patients for symptoms and discontinue Topotecan Injection if the diagnosis is confirmed.
( 5.3 ) Pregnancy: Can cause fetal harm. Advise women of potential risk to the fetus. ( 5.4 , 8.1 )
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Bone marrow suppression (primarily neutropenia) is the dose-limiting toxicity of Topotecan Injection. Neutropenia is not cumulative over time. In the comparative study, in small cell lung cancer, the treatment-related death rates were 5% for topotecan and 4% for CAV (cyclophosphamide-doxorubicin-vincristine). Neutropenia From a combined experience of patients receiving topotecan which included patients treated for small cell lung cancer: Grade 4 neutropenia (<500 cells/mm 3 ) was most common during course 1 of treatment (60% of patients) and occurred in 39% of all courses, with a median duration of 7 days.
The nadir neutrophil count occurred at a median of 12 days. Therapy-related sepsis or febrile neutropenia occurred in 23% of patients, and sepsis was fatal in 1%. Pancytopenia has been reported. Cervical cancer experience: Grade 3 and grade 4 neutropenia affected 26 % and 48 % of patients, respectively. Thrombocytopenia From a combined experience of patients receiving topotecan which included patients treated for small cell lung cancer: Grade 4 thrombocytopenia (<25,000/mm 3 ) occurred in 27% of patients and in 9% of courses, with a median duration of 5 days and platelet nadir at a median of 15 days.
Platelet transfusions were given to 15% of patients in 4% of courses. Cervical cancer experience: Grade 3 and grade 4 thrombocytopenia affected 26 % and 7 % of patients, respectively. Anemia From a combined experience of patients receiving topotecan which included patients treated for small cell lung cancer: Grade 3/4 anemia (<8 g/dL) occurred in 37% of patients and in 14% of courses. Median nadir was at day 15. Transfusions were needed in 52% of patients in 22% of courses.
Cervical cancer experience: Grade 3 and grade 4 anemia affected 34 % and 6 % of patients, respectively. Monitoring of Bone Marrow Function Administer Topotecan Injection only in patients with adequate bone marrow reserves, including baseline neutrophil count of at least 1,500 cells/mm 3 and platelet count at least 100,000/mm 3 . Monitor peripheral blood counts frequently during treatment with Topotecan Injection. Do not treat patients with subsequent courses of Topotecan Injection until neutrophils recover to >1,000 cells/mm 3 , platelets recover to >100,000 cells/mm 3 , and hemoglobin levels recover to 9 g/dL (with transfusion if necessary).Severe myelotoxicity has been reported when Topotecan Injection is used in combination with cisplatin [see Drug Interactions ( 7 ) ]
5.2Neutropenic Colitis
Topotecan-induced neutropenia can lead to neutropenic colitis. Fatalities due to neutropenic colitis have been reported in clinical trials with Topotecan Injection. In patients presenting with fever, neutropenia, and a compatible pattern of abdominal pain, consider the possibility of neutropenic colitis.
5.3Interstitial Lung Disease Topotecan
Injection has been associated with reports of interstitial lung disease (ILD), some of which have been fatal [see Adverse Reactions ( 6.2 ) ]. Underlying risk factors include history of ILD, pulmonary fibrosis, lung cancer, thoracic exposure to radiation, and use of pneumotoxic drugs and/or colony stimulating factors. Monitor patients for pulmonary symptoms indicative of interstitial lung disease (e.g., cough, fever, dyspnea, and/or hypoxia), and discontinue Topotecan Injection if a new diagnosis of ILD is confirmed.
5.4Pregnancy Pregnancy Category D Topotecan
Injection can cause fetal harm when administered to a pregnant woman. Topotecan caused embryolethality, fetotoxicity, and teratogenicity in rats and rabbits when administered during organogenesis. There are no adequate and well controlled studies of Topotecan Injection in pregnant women. If this drug is used during pregnancy, or if a patient becomes pregnant while receiving Topotecan Injection, the patient should be apprised of the potential hazard to the fetus. [see Use in Specific Populations, Pregnancy ( 8.1 ) ]
5.5Inadvertent Extravasation
Inadvertent extravasation with topotecan has been observed, most reactions have been mild but severe cases have been reported.
Interactions
G-CSF: Concomitant administration of G-CSF can prolong the duration of neutropenia, so if G-CSF is to be used, do not initiate it until day 6 of the course of therapy, 24 hours after completion of treatment with Topotecan Injection. Platinum and Other Cytotoxic Agents: Myelosuppression was more severe when topotecan, at a dose of 1.25 mg/m 2 /day for 5 days, was given in combination with cisplatin at a dose of 50 mg/m 2 in Phase 1 studies.
In one study, 1 of 3 patients had severe neutropenia for 12 days and a second patient died with neutropenic sepsis. Greater myelosuppression is also likely to be seen when Topotecan Injection is used in combination with other cytotoxic agents, thereby necessitating a dose reduction. However, when combining topotecan with platinum agents (e.g., cisplatin or carboplatin), a distinct sequence-dependent interaction on myelosuppression has been reported.
Coadministration of a platinum agent on day 1 of dosing with topotecan required lower doses of each agent compared to co-administration on day 5 of the dosing schedule for topotecan. For information on the pharmacokinetics, efficacy, safety, and dosing of Topotecan Injection at a dose of 0.75 mg/m 2 /day on days 1, 2, and 3 in combination with cisplatin 50 mg/m 2 on day 1 for cervical cancer [see Dosage and Administration ( 2 ) , Adverse Reactions ( 6 ), Clinical Pharmacology ( 12.3 ) and Clinical Studies ( 14 ) ] .
Do not initiate G-CSF until 24 hours after completion of treatment with Topotecan Injection. Concomitant administration can prolong duration of neutropenia. ( 7 ) Greater myelosuppression is likely to be seen when used in combination with other cytotoxic agents. ( 7 )
Pregnancy and breastfeeding
8.1Pregnancy Pregnancy Category
D [see Warnings and Precautions ( 5.4 ) ]. Topotecan Injection can cause fetal harm when administered to a pregnant woman. In rabbits, a dose of 0.1 mg/kg/day (about equal to the clinical dose of 1.5 mg/m 2 ) given on days 6 through 20 of gestation caused maternal toxicity, embryolethality, and reduced fetal body weight. In the rat, a dose of 0.23 mg/kg/day (about equal to the clinical dose of 1.5 mg/m 2 ) given for 14 days before mating through gestation day 6 caused fetal resorption, microphthalmia, pre-implant loss, and mild maternal toxicity.
A dose of 0.1 mg/kg/day (about half the clinical dose of 1.5 mg/m 2 ) given to rats on days 6 through 17 of gestation caused an increase in post-implantation mortality. This dose also caused an increase in total fetal malformations. The most frequent malformations were of the eye (microphthalmia, anophthalmia, rosette formation of the retina, coloboma of the retina, ectopic orbit), brain (dilated lateral and third ventricles), skull, and vertebrae.
There are no adequate and well controlled studies of Topotecan Injection in pregnant women. If this drug is used during pregnancy, or if a patient becomes pregnant while receiving Topotecan Injection, the patient should be apprised of the potential hazard to the fetus. [see Warnings and Precautions ( 5.4 ) ]
Adverse reactions
Small cell lung cancer: The most common hematologic adverse reactions were: neutropenia (97%), leukopenia (97%), anemia (89%), and thrombocytopenia (69%). ( 6.1 ) The most common (>25%) non-hematologic adverse reactions (all grades) were: nausea, alopecia, vomiting, sepsis or pyrexia/infection with neutropenia, diarrhea, constipation, fatigue, and pyrexia. ( 6.1 ) Cervical cancer (Topotecan Injection plus cisplatin): The most common hematologic adverse reactions (all grades) were: anemia (94%), leukopenia (91%), neutropenia (89%), and thrombocytopenia (74%).
( 6.1 ) The most common (>25%) non-hematologic adverse reactions (all grades) were: pain, nausea, vomiting, and infection/febrile neutropenia. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Accord Healthcare Inc. at 1-866-941-7875 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch
6.1Clinical 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. Small Cell Lung Cancer Data in the following section are based on the combined experiences of the 879 patients studied, including 426 patients with small cell lung cancer treated with topotecan.
Table 1 lists the principle hematologic adverse reactions and Table 2 lists non-hematologic adverse reactions occurring in at least 15% of patients. Table 1. Hematologic Adverse Reactions Experienced in ≥15% of Patients, Including 426 Patients With Small Cell Lung Cancer, Receiving Topotecan Hematologic Adverse Reaction Patients (n=879) % Incidence Neutropenia <1,500 cells/mm 3 <500 cells/mm 3 97 78 Leukopenia <3,000 cells/mm 3 <1,000 cells/mm 3 97 32 Thrombocytopenia <75,000/mm 3 <25,000/mm 3 69 27 Anemia <10 g/dL <8 g/dL 89 37 Table 2.
Non-hematologic Adverse Reactions Experienced by ≥15% of 879 Patients, Including 426 Patients With Small Cell Lung Cancer, Receiving Topotecan Non-hematologic Adverse Reaction Percentage of Patients with Adverse Reaction (879 Patients) All Grades Grade 3 Grade 4 Infections and infestations Sepsis or pyrexia/infection with neutropenia a 43 NR 23 Metabolism and nutrition disorders Anorexia 19 2 <1 Nervous system disorders Headache 18 1 <1 Respiratory, thoracic, and mediastinal disorders Dyspnea 22 5 3 Coughing 15 1 0 Gastrointestinal disorders Nausea 64 7 1 Vomiting 45 4 1 Diarrhea 32 3 1 Constipation 29 2 1 Abdominal pain 22 2 2 Stomatitis 18 1 <1 Skin and subcutaneous tissue disorders Alopecia 49 NA NA Rash b 16 1 0 General disorders and administrative site conditions Fatigue 29 5 0 Pyrexia 28 1 <1 Pain c 23 2 1 Asthenia 25 4 2 NA = Not applicable NR = Not reported separately a Does not include Grade 1 sepsis or pyrexia b Rash also includes pruritus, rash erythematous, urticaria, dermatitis, bullous eruption, and maculopapular rash. c Pain includes body pain, back pain, and skeletal pain.
Nervous System Disorders Paresthesia occurred in 7% of patients but was generally grade 1. Hepatobiliary Disorders Grade 1 transient elevations in hepatic enzymes occurred in 8% of patients. Greater elevations, grade 3/4, occurred in 4%. Grade 3/4 elevated bilirubin occurred in <2% of patients. Table 3 shows the grade 3/4 hematologic and major non-hematologic adverse reactions in the topotecan/CAV comparator trial in small cell lung cancer.
Table 3. Adverse Reactions Experienced by ≥5% of Small Cell Lung Cancer Patients Randomized to Receive Topotecan or CAV Adverse Reaction Topotecan (n=107) CAV (n=104) Hematologic Grade 3/4 % % Grade 4 neutropenia (<500 cells/mm 3 ) 70 72 Grade 3/4 anemia (Hgb <8 g dL) 42 20 Grade 4 thrombocytopenia (<25,000 plts/mm 3 ) 29 5 Pyrexia/Grade 4 neutropenia 28 26 Non-hematologic Grade 3/4 % % Infections and infestations Documented sepsis a 5 5 Respiratory, thoracic, and mediastinal disorders Dyspnea 9 14 Pneumonia 8 6 Gastrointestinal disorders Abdominal pain 6 4 Nausea 8 6 General disorders and administrative site conditions Fatigue 6 10 Asthenia 9 7 Pain b 5 7 a Death related to sepsis occurred in 3% of patients receiving topotecan, and in 1% of patients receiving CAV b Pain includes body pain, skeletal pain, and back pain.
Cervical Cancer In the comparative trial with Topotecan Injection plus cisplatin versus cisplatin in patients with cervical cancer, the most common dose-limiting adverse reaction was myelosuppression. Table 4 shows the hematologic adverse reactions and Table 5 shows the non-hematologic adverse reactions in patients with cervical cancer. Table 4. Hematologic Adverse Reactions in Patients with Cervical Cancer Treated with Topotecan Injection Plus Cisplatin or Cisplatin Monotherapy a Hematologic Adverse Reaction Topotecan Injection Plus Cisplatin (n = 140) Cisplatin (n = 144) Anemia All grades (Hgb <12 g/dL) 131 (94%) 130 (90%) Grade 3 (Hgb <8 to 6.5 g/dL) 47 (34%) 28 (19%) Grade 4 (Hgb <6.5 g/dL) 9 (6%) 5 (3%) Leukopenia All grades (<3,800 cells/mm 3 ) 128 (91%) 43 (30%) Grade 3 (<2,000 to 1,000 cells/mm 3 ) 58 (41%) 1 (1%) Grade 4 (<1,000 cells/mm 3 ) 35 (25%) 0 (0%) Neutropenia All grades (<2,000 cells/mm 3 ) 125 (89%) 28 (19%) Grade 3 (<1,000 to 500 cells/mm 3 ) 36 (26%) 1 (1%) Grade 4 (<500 cells/mm 3 ) 67 (48%) 1 (1%) Thrombocytopenia All grades (<130,000 cells/mm 3 ) 104 (74%) 21 (15%) Grade 3 (<50,000 to 10,000 cells/mm 3 ) 36 (26%) 5 (3%) Grade 4 (<10,000 cells/mm 3 ) 10 (7%) 0 (0%) a Includes patients who were eligible and treated.
There were 3 patients who experienced grade 5 deaths with investigator-designated attribution. One was a grade 5 hemorrhage in which the drug-related thrombocytopenia aggravated the event. A second patient experienced bowel obstruction, cardiac arrest, pleural effusion and respiratory failure which were not treatment related but probably aggravated by treatment. A third patient experienced a pulmonary embolism and adult respiratory distress syndrome, the latter was indirectly treatment-related. c Constitutional includes fatigue (lethargy, malaise, asthenia), fever (in the absence of neutropenia), rigors, chills, sweating, and weight gain or loss. d Pain includes abdominal pain o
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