dasatinib 100 MG Oral Tablet [Phyrago]

INDICATIONS AND USAGE Dasatinib tablet is indicated for the treatment of adult patients with newly diagnosed Philadelphia chromosome-positive (Ph+) chronic myeloid leukemia (CML) in chronic phase. chronic, accelerated, or myeloid or lymphoid blast phase Ph+ CML with resistance or intolerance to prior therapy including imatinib. Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) with resistance or intolerance to prior therapy. Dasatinib tablet is indicated for the treatment of pediatric patients 1 year of age and older with • Ph+ CML in chronic phase. Additional pediatric use information is approved for Bristol-Myers Squibb Company’s Sprycel (dasatinib) tablets. However, due to Bristol-Myers Squibb Company’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. Dasatinib tablet is a kinase inhibitor indicated for the treatment of • newly diagnosed adults with Philadelphia chromosome-positive (Ph+) chronic myeloid leukemia (CML) in chronic phase. (1, 14) • adults with chronic, accelerated, or myeloid or lymphoid blast phase Ph+ CML with resistance or intolerance to prior therapy including imatinib. (1, 14) • adults with Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) with resistance or intolerance to prior therapy. (1, 14) • pediatric patients 1 year of age and older with Ph+ CML in chronic phase. (1, 14)

DOSAGE AND ADMINISTRATION Chronic phase CML in adults: 100 mg once daily. ( 2 ) Accelerated phase CML, myeloid or lymphoid blast phase CML, or Ph+ ALL in adults: 140 mg once daily. ( 2 ) Chronic phase CML and ALL in pediatrics: starting dose based on body weight. ( 2 ) Administer orally, with or without a meal. Do not crush, cut, or chew tablets. ( 2 ) 2.1 Dosage of Dasatinib Tablets in Adult Patients The recommended starting dosage of dasatinib tablets for chronic phase CML in adults is 100 mg administered orally once daily. The recommended starting dosage of dasatinib tablets for accelerated phase CML, myeloid or lymphoid blast phase CML, or Ph+ ALL in adults is 140 mg administered orally once daily. Tablets should not be crushed, cut, or chewed; they should be swallowed whole. Dasatinib tablets can be taken with or without a meal, either in the morning or in the evening. 2.2 Dosage of Dasatinib Tablets in Pediatric Patients with CML or Ph+ ALL The recommended starting dosage for pediatrics is based on body weight as shown in Table 1. The recommended dose should be administered orally once daily with or without food. Recalculate the dose every 3 months based on changes in body weight, or more often if necessary. Do not crush, cut or chew tablets. Swallow tablets whole. There are additional administration considerations for pediatric patients who have difficulty swallowing tablets whole [see Use in Specific Populations (8.4) and Clinical Pharmacology (12.3)]. Table 1: Dosage of Dasatinib Tablets for Pediatric Patients a Body Weight (kg) b Daily Dose (mg) 10 to less than 20 40 mg 20 to less than 30 60 mg 30 to less than 45 70 mg at least 45 100 mg a For pediatric patients with Ph+ ALL, begin dasatinib tablets therapy on or before day 15 of induction chemotherapy, when diagnosis is confirmed and continue for 2 years. b Tablet dosing is not recommended for patients weighing less than 10 kg. Refer to Section 2.4 for recommendations on dose escalation in adults with CML and Ph+ ALL, and pediatric patients with CML. 2.3 Dose Modification Strong CYP3A4 Inducers Avoid the use of concomitant strong CYP3A4 inducers and St. John’s wort. If patients must be coadministered a strong CYP3A4 inducer, consider a dasatinib tablets dose increase. If the dose of dasatinib tablets is increased, monitor the patient carefully for toxicity [ see Drug Interactions (7.1) ] . Strong CYP3A4 Inhibitors Avoid the use of concomitant strong CYP3A4 inhibitors and grapefruit juice. Recommend selecting an alternate concomitant medication with no or minimal enzyme inhibition potential, if possible. If dasatinib tablets must be administered with a strong CYP3A4 inhibitor, consider a dose decrease to: 40 mg daily for patients taking dasatinib tablets 140 mg daily. 20 mg daily for patients taking dasatinib tablets 100 mg daily. 20 mg daily for patients taking dasatinib tablets 70 mg daily. For patients taking dasatinib tablets 60 mg or 40 mg daily, consider interrupting dasatinib tablets until the inhibitor is discontinued. Allow a washout period of approximately 1 week after the inhibitor is stopped before reinitiating dasatinib tablets. These reduced doses of dasatinib tablets are predicted to adjust the area under the curve (AUC) to the range observed without CYP3A4 inhibitors; however, clinical data are not available with these dose adjustments in patients receiving strong CYP3A4 inhibitors. If dasatinib tablets are not tolerated after dose reduction, either discontinue the strong CYP3A4 inhibitor or interrupt dasatinib tablets until the inhibitor is discontinued. Allow a washout period of approximately 1 week after the inhibitor is stopped before the dasatinib tablets dose is increased [ see Drug Interactions (7.1) ] . 2.4 Dose Escalation in Adults with CML and Ph+ ALL, and Pediatric Patients with CML For adult patients with CML and Ph+ ALL, consider dose escalation to 140 mg once daily (chronic phase CML) or 180 mg once daily (advanced phase CML and Ph+ ALL) in patients who do not achieve a hematologic or cytogenetic response at the recommended starting dosage. For pediatric patients with CML, consider dose escalation to 120 mg once daily (see Table 2 below). Dose escalation is not recommended for pediatric patients with Ph+ ALL, where dasatinib tablets is administered in combination with chemotherapy. Escalate the dasatinib tablets dose as shown in Table 2 in pediatric patients with chronic phase CML who do not achieve a hematologic or cytogenetic response at the recommended starting dosage. Table 2: Dose Escalation for Pediatric CML Formulation Dose (maximum dose per day) Starting Dose Escalation Tablets 40 mg 50 mg 60 mg 70 mg 70 mg 90 mg 100 mg 120 mg 2.5 Dose Adjustment for Adverse Reactions Myelosuppression In clinical studies, myelosuppression was managed by dose interruption, dose reduction, or discontinuation of study therapy. Hematopoietic growth factor has been used in patients with resistant myelosuppression. Guidelines for dose modifications for adult and pediatric patients are summarized in Tables 3 and 4, respectively. Table 3: Dose Adjustments for Neutropenia and Thrombocytopenia in Adults *ANC: absolute neutrophil count Chronic Phase CML (starting dose 100 mg once daily) ANC* <0.5 × 10 9 /L or Platelets <50 × 10 9 /L Stop dasatinib tablets until ANC ≥1.0 × 10 9 /L and platelets ≥50 × 10 9 /L. Resume treatment with dasatinib tablets at the original starting dose if recovery occurs in ≤7 days. If platelets <25 × 10 9 /L or recurrence of ANC <0.5 × 10 9 /L for >7 days, repeat Step 1 and resume dasatinib tablets at a reduced dose of 80 mg once daily for second episode. For third episode, further reduce dose to 50 mg once daily (for newly diagnosed patients) or discontinue dasatinib tablets (for patients resistant or intolerant to prior therapy including imatinib). Accelerated Phase CML, Blast Phase CML and Ph+ ALL (starting dose 140 mg once daily) ANC* <0.5 × 10 9 /L or Platelets <10 × 10 9 /L Check if cytopenia is related to leukemia (marrow aspirate or biopsy). If cytopenia is unrelated to leukemia, stop dasatinib tablets until ANC ≥1.0 × 10 9 /L and platelets ≥20 × 10 9 /L and resume at the original starting dose. If recurrence of cytopenia, repeat Step 1 and resume dasatinib tablets at a reduced dose of 100 mg once daily (second episode) or 80 mg once daily (third episode). If cytopenia is related to leukemia, consider dose escalation to 180 mg once daily. Table 4: Dose Adjustments for Neutropenia and Thrombocytopenia in Pediatric Patients with Ph+ CML Dose (maximum dose per day) If cytopenia persists for more than 3 weeks, check if cytopenia is related to leukemia (marrow aspirate or biopsy). If cytopenia is unrelated to leukemia, stop dasatinib tablets until ANC* ≥1.0 x 10 9 /L and platelets ≥75 x 10 9 /L and resume at the original starting dose or at a reduced dose. If cytopenia recurs, repeat marrow aspirate/biopsy and resume dasatinib tablets at a reduced dose. Original Starting Dose One-Level Dose Reduction Two-Level Dose Reduction Tablets 40 mg 20 mg ** 60 mg 40 mg 20 mg 70 mg 60 mg 50 mg 100 mg 80 mg 70 mg *ANC: absolute neutrophil count ** lower tablet dose not available For pediatric patients with chronic phase CML, if Grade ≥ 3 neutropenia or thrombocytopenia recurs during complete hematologic response (CHR), interrupt dasatinib tablets and resume at a reduced dose. Implement temporary dose reductions for intermediate degrees of cytopenia and disease response as needed. For pediatric patients with Ph+ ALL, if neutropenia and/or thrombocytopenia result in a delay of the next block of treatment by more than 14 days, interrupt dasatinib tablets and resume at the same dose level once the next block of treatment is started. If neutropenia and/or thrombocytopenia persist and the next block of treatment is delayed another 7 days, perform a bone marrow assessment to assess cellularity and percentage of blasts. If marrow cellularity is <10%, interrupt treatment

WARNINGS AND PRECAUTIONS Myelosuppression and Bleeding Events: Severe thrombocytopenia, neutropenia, and anemia may occur. Use caution if used concomitantly with medications that inhibit platelet function or anticoagulants. Monitor complete blood counts regularly. Transfuse and interrupt dasatinib tablets when indicated. ( 2.5 , 5.1 , 5.2 ) Fluid Retention: Fluid retention, sometimes severe, including pleural effusions. Manage with supportive care measures and/or dose modification. ( 2.5 , 5.3 ) Cardiovascular Toxicity: Monitor patients for signs or symptoms and treat appropriately. ( 5.4 ) Pulmonary Arterial Hypertension (PAH): Dasatinib tablets may increase the risk of developing PAH which may be reversible on discontinuation. Consider baseline risk and evaluate patients for signs and symptoms of PAH during treatment. Stop dasatinib tablets if PAH is confirmed. ( 5.5 ) QT Prolongation: Use dasatinib tablets with caution in patients who have or may develop prolongation of the QT interval. ( 5.6 ) Severe Dermatologic Reactions: Individual cases of severe mucocutaneous dermatologic reactions have been reported. ( 5.7 ) Tumor Lysis Syndrome: Tumor lysis syndrome has been reported. Maintain adequate hydration and correct uric acid levels prior to initiating therapy with dasatinib tablets. ( 5.8 ) Embryo-Fetal Toxicity: Can cause fetal harm. Advise patients of reproductive potential of potential risk to fetus and to use effective contraception. ( 5.9 , 8.1 , 8.3 ) Effects on Growth and Development in Pediatric Patients: epiphyses delayed fusion, osteopenia, growth retardation, and gynecomastia have been reported. Monitor bone growth and development in pediatric patients. ( 5.10 ) Hepatotoxicity: Assess liver function before initiation of treatment and monthly thereafter or as clinically indicated. Monitor liver function when combined with chemotherapy known to be associated with liver dysfunction. ( 5.11 ) 5.1 Myelosuppression Treatment with dasatinib is associated with severe (NCI CTCAE Grade 3 or 4) thrombocytopenia, neutropenia, and anemia, which occur earlier and more frequently in patients with advanced phase CML or Ph+ ALL than in patients with chronic phase CML [ see Adverse Reactions (6.1) ] . In patients with chronic phase CML, perform complete blood counts (CBCs) every 2 weeks for 12 weeks, then every 3 months thereafter, or as clinically indicated. In patients with advanced phase CML or Ph+ ALL, perform CBCs weekly for the first 2 months and then monthly thereafter, or as clinically indicated. In pediatric patients with Ph+ ALL treated with dasatinib in combination with chemotherapy, perform CBCs prior to the start of each block of chemotherapy and as clinically indicated. During the consolidation blocks of chemotherapy, perform CBCs every 2 days until recovery. Myelosuppression is generally reversible and usually managed by withholding dasatinib temporarily and/or dose reduction [ see Dosage and Administration (2.5) ] . 5.2 Bleeding-Related Events Dasatinib can cause serious and fatal bleeding. In all CML or Ph+ ALL clinical studies, Grade ≥3 central nervous system (CNS) hemorrhages, including fatalities, occurred in <1% of patients receiving dasatinib. The incidence of Grade 3/4 hemorrhage occurred in 5.8% of adult patients and generally required treatment interruptions and transfusions. The incidence of Grade 5 hemorrhage occurred in 0.4% of adult patients. The most frequent site of hemorrhage was gastrointestinal [ see Adverse Reactions (6.1) ] . Most bleeding events in clinical studies were associated with severe thrombocytopenia. In addition to causing thrombocytopenia in human subjects, dasatinib caused platelet dysfunction in vitro . Concomitant medications that inhibit platelet function or anticoagulants may increase the risk of hemorrhage. 5.3 Fluid Retention Dasatinib may cause fluid retention [ see Adverse Reactions (6.1) ] . After 5 years of follow-up in the adult randomized newly diagnosed chronic phase CML study (n=258), Grade 3 or 4 fluid retention was reported in 5% of patients, including 3% of patients with Grade 3 or 4 pleural effusion. In adult patients with newly diagnosed or imatinib-resistant or -intolerant chronic phase CML, Grade 3 or 4 fluid retention occurred in 6% of patients treated with dasatinib at the recommended dose (n=548). In adult patients with advanced phase CML or Ph+ ALL treated with dasatinib at the recommended dose (n=304), Grade 3 or 4 fluid retention was reported in 8% of patients, including Grade 3 or 4 pleural effusion reported in 7% of patients. In pediatric patients with chronic phase CML, cases of Grade 1 or 2 fluid retention were reported in 10.3% of patients. Evaluate patients who develop symptoms of pleural effusion or other fluid retention, such as new or worsened dyspnea on exertion or at rest, pleuritic chest pain, or dry cough, promptly with a chest x-ray or additional diagnostic imaging as appropriate. Fluid retention events were typically managed by supportive care measures that may include diuretics or short courses of steroids. Severe pleural effusion may require thoracentesis and oxygen therapy. Consider dose reduction or treatment interruption [ see Dosage and Administration (2.5) ] . 5.4 Cardiovascular Toxicity Dasatinib can cause cardiac dysfunction [ see Adverse Reactions (6.1) ] . After 5 years of follow-up in the randomized newly diagnosed chronic phase CML trial in adults (n=258), the following cardiac adverse reactions occurred: cardiac ischemic events (3.9% dasatinib vs 1.6% imatinib), cardiac-related fluid retention (8.5% dasatinib vs 3.9% imatinib), and conduction system abnormalities, most commonly arrhythmia and palpitations (7.0% dasatinib vs 5.0% imatinib). Two cases (0.8%) of peripheral arterial occlusive disease occurred with imatinib and 2 (0.8%) transient ischemic attacks occurred with dasatinib. Monitor patients for signs or symptoms consistent with cardiac dysfunction and treat appropriately. 5.5 Pulmonary Arterial Hypertension Dasatinib may increase the risk of developing pulmonary arterial hypertension (PAH) in adult and pediatric patients which may occur any time after initiation, including after more than 1 year of treatment. Manifestations include dyspnea, fatigue, hypoxia, and fluid retention [ see Adverse Reactions (6.1) ] . PAH may be reversible on discontinuation of dasatinib. Evaluate patients for signs and symptoms of underlying cardiopulmonary disease prior to initiating dasatinib and during treatment. If PAH is confirmed, dasatinib should be permanently discontinued. 5.6 QT Prolongation Dasatinib may increase the risk of prolongation of QTc in patients including those with hypokalemia or hypomagnesemia, patients with congenital long QT syndrome, patients taking antiarrhythmic medicines or other medicinal products that lead to QT prolongation, and cumulative high-dose anthracycline therapy [ see Adverse Reactions (6.1) ] . Correct hypokalemia or hypomagnesemia prior to and during dasatinib administration. 5.7 Severe Dermatologic Reactions Cases of severe mucocutaneous dermatologic reactions, including Stevens-Johnson syndrome [ see Adverse Reactions (6.2) ] and erythema multiforme, have been reported in patients treated with dasatinib. Discontinue permanently in patients who experience a severe mucocutaneous reaction during treatment if no other etiology can be identified. 5.8 Tumor Lysis Syndrome Tumor lysis syndrome has been reported in patients with resistance to prior imatinib therapy, primarily in advanced phase disease. Due to potential for tumor lysis syndrome, maintain adequate hydration, correct uric acid levels prior to initiating therapy with dasatinib, and monitor electrolyte levels. Patients with advanced stage disease and/or high tumor burden may be at increased risk and should be monitored more frequently [ see Adverse Reactions (6.1) ] . 5.9 Embryo-Fetal Toxicity Based on limited human data, dasatinib can cause fetal harm when admini

4. CONTRAINDICATIONS None. None. ( 4 )

Mechanism of Action Dasatinib, at nanomolar concentrations, inhibits the following kinases: BCR-ABL, SRC family (SRC, LCK, YES, FYN), c-KIT, EPHA2, and PDGFRβ. Based on modeling studies, dasatinib is predicted to bind to multiple conformations of the ABL kinase. In vitro , dasatinib was active in leukemic cell lines representing variants of imatinib mesylate‑-sensitive and resistant disease. Dasatinib inhibited the growth of chronic myeloid leukemia (CML) and acute lymphoblastic leukemia (ALL) cell lines overexpressing BCR-ABL. Under the conditions of the assays, dasatinib could overcome imatinib resistance resulting from BCR-ABL kinase domain mutations, activation of alternate signaling pathways involving the SRC family kinases (LYN, HCK), and multi-drug resistance gene overexpression.