Bosutinib Monohydrate: FDA label

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Indications

Bosutinib tablets are indicated for the treatment of:

Adult patients with chronic phase (CP) Philadelphia chromosome-positive chronic myelogenous leukemia (Ph+ CML), resistant or intolerant to prior therapy [see Clinical Studies (14.2)].
Adult patients with accelerated phase (AP), or blast phase (BP) Ph+ CML with resistance or intolerance to prior therapy [see Clinical Studies (14.2)] . Pediatric use information is approved for PF PRISM CV’s BOSULIF® (bosutinib) tablets. However, due to PF PRISM CV’s marketing exclusivity rights, this drug product is not labeled with that information. Bosutinib is a kinase inhibitor indicated for the treatment of:
adult patients with chronic phase Ph+ chronic myelogenous leukemia (CML), resistant or intolerant to prior therapy. ( 1 )
adult patients with accelerated, or blast phase Ph+ CML with resistance or intolerance to prior therapy. ( 1 )

Warnings and precautions

Gastrointestinal Toxicity: Monitor and manage as necessary. Withhold, dose reduce, or discontinue bosutinib tablets. ( 2.3 , 5.1 )
Myelosuppression: Monitor blood counts and manage as necessary. Withhold, dose reduce or discontinue bosutinib tablets ( 2.4 , 5.2 )
Hepatic Toxicity: Monitor liver enzymes at least monthly for the first 3 months and as needed. Withhold, dose reduce, or discontinue bosutinib tablets. ( 2.3 , 5.3 )
Cardiovascular Toxicity: Monitor and manage as necessary. Interrupt, dose reduce, or discontinue bosutinib tablets. ( 5.4 )
Fluid Retention: Monitor patients and manage using standard of care treatment. Interrupt, dose reduce, or discontinue bosutinib tablets. ( 2.3 , 5.5 )
Renal Toxicity: Monitor patients for renal function at baseline and during therapy with bosutinib tablets. ( 5.6 )

Pregnancy and breastfeeding

8.1Pregnancy Risk Summary Based

on findings from animal studies and its mechanism of action, bosutinib tablets can cause fetal harm when administered to a pregnant woman [see Clinical Pharmacology (12.1)] . There are no available data in pregnant women to inform the drug-associated risk. In animal reproduction studies conducted in rats and rabbits, oral administration of bosutinib during organogenesis caused adverse developmental outcomes, including structural abnormalities, embryo-fetal mortality, and alterations to growth at maternal exposures (AUC) as low as 1.2 times the human exposure at the dose of 500 mg/day (see Data ) .

Advise pregnant women of the potential risk to a fetus. The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies are 2 to 4% and 15 to 20%, respectively.

Data Animal Data In a rat fertility and early embryonic development study, bosutinib was administered orally to female rats for approximately 3 to 6 weeks, depending on day of mating (2 weeks prior to cohabitation with untreated breeder males until gestation day [GD] 7). Increased embryonic resorptions occurred at greater than or equal to 10 mg/kg/day of bosutinib (1.6 and 1.2 times the human exposure at the recommended doses of 400 or 500 mg/day, respectively), and decreased implantations and reduced number of viable embryos at 30 mg/kg/day of bosutinib (3.4 and 2.5 times the human exposure at the recommended doses of 400 or 500 mg/day, respectively).

In an embryo-fetal development study conducted in rabbits, bosutinib was administered orally to pregnant animals during the period of organogenesis at doses of 3, 10 and 30 mg/kg/day. At the maternally-toxic dose of 30 mg/kg/day of bosutinib, there were fetal anomalies (fused sternebrae, and 2 fetuses had various visceral observations), and an approximate 6% decrease in fetal body weight. The dose of 30 mg/kg/day resulted in exposures (AUC) approximately 5.1 and 3.8 times the human exposures at the recommended doses of 400 and 500 mg/day, respectively.

Fetal exposure to bosutinib-derived radioactivity during pregnancy was demonstrated in a placental-transfer study in pregnant rats. In a rat pre-and postnatal development study, bosutinib was administered orally to pregnant animals during the period of organogenesis through lactation day 20 at doses of 10, 30, and 70 mg/kg/day. Reduced number of pups born occurred at greater than or equal to 30 mg/kg/day bosutinib (3.4 and 2.5 times the human exposure at the recommended doses of 400 or 500 mg/day, respectively), and increased incidence of total litter loss and decreased growth of offspring after birth occurred at 70 mg/kg/day bosutinib (6.9 and 5.1 times the human exposure at the recommended doses of 400 or 500 mg/day, respectively).

Adverse reactions

The following clinically significant adverse reactions are discussed in greater detail in other sections of the labeling: Gastrointestinal toxicity [see Warnings and Precautions (5.1)] . Myelosuppression [see Warnings and Precautions (5.2)] . Hepatic toxicity [see Warnings and Precautions (5.3)] . Cardiovascular toxicity [see Warnings and Precautions (5.4)]. Fluid retention [see Warnings and Precautions (5.5)] . Renal toxicity [see Warnings and Precautions ( 5.6)] .

Most common adverse reactions (≥20%), in adult patients with CML are diarrhea, abdominal pain, vomiting, nausea, rash, fatigue, hepatic dysfunction, headache, pyrexia, and respiratory tract infection. The most common laboratory abnormalities (≥20%) in adult patients are creatinine increased, hemoglobin decreased, lymphocyte count decreased, platelets decreased, ALT increased, calcium decreased, white blood cell count decreased, AST increased, absolute neutrophil count decreased, glucose increased, phosphorus decreased, urate increased, alkaline phosphatase increased, lipase increased, creatine kinase increased, and amylase increased. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Alembic Pharmaceuticals Limited at 1-866-210-9797 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. The most common adverse reactions, in ≥20% of adults with resistance or intolerance to prior therapy (N=814) were diarrhea (80%), rash (44%), nausea (44%), abdominal pain (43%), vomiting (33%), fatigue (33%), hepatic dysfunction (33%), respiratory tract infection (25%), pyrexia (24%), and headache (21%).

The most common laboratory abnormalities that worsened from baseline in ≥20% of adults were creatinine increased (93%), hemoglobin decreased (90%), lymphocyte count decreased (72%), platelets decreased (69%), ALT increased (58%), calcium decreased (53%), white blood cell count decreased (52%), absolute neutrophils count decreased (50%), AST increased (50%), glucose increased (46%), phosphorus decreased (44%), urate increased (41%), alkaline phosphatase increased (40%), lipase increased (36%), creatine kinase increased (29%), and amylase increased (24%).

Adverse Reactions in Adult Patients With Imatinib-Resistant or-Intolerant Ph+ CP, AP, and BP CML The single-arm clinical trial enrolled patients with Ph+ CP, AP and BP CML and with resistance or intolerance to prior therapy [see Clinical Studies (14.2)]. The safety population (received at least 1 dose of bosutinib tablets) included 546 CML patients:

two hundred eighty-four (284) patients with CP CML previously treated with imatinib only who had a median duration of bosutinib tablets treatment of 26 months (range: 0.2 to 155 months), and a median dose intensity of 437 mg/day.
one hundred and nineteen (119) patients with CP CML previously treated with both imatinib and at least 1 additional tyrosine kinase inhibitor (TKI) who had a median duration of bosutinib tablets treatment of 9 months (range: 0.2 to 148 months), and a median dose intensity of 427 mg/day.
one hundred forty three (143) patients with advanced phase (AdvP) CML including 79 patients with AP CML and 64 patients with BP CML. In the patients with AP CML and BP CML, the median duration of bosutinib tablets treatment was 10 months (range: 0.1 to 140 months) and 3 months (range: 0.03 to 71 months), respectively. The median dose intensity was 406 mg/day, and 456 mg/day, in the AP CML and BP CML cohorts, respectively. Serious adverse reactions occurred in 30% of patients in the safety population of the single-arm trial in patients with CML (N=546) who were resistant or intolerant to prior therapy. Serious adverse reactions reported in >2% of patients included pneumonia (7%), pleural effusion (6%), pyrexia (3.7%), coronary artery disease (3.5%), dyspnea (2.6%), rash (2.2%), thrombocytopenia (2%), abdominal pain (2%), and diarrhea (2%). Fatal adverse reactions occurred in 12 patients (2.2%) due to coronary artery disease (0.9%), pneumonia (0.4%), respiratory failure (0.4%), gastrointestinal hemorrhage (0.2%), acute kidney injury (0.2%), and acute pulmonary edema (0.2%). Permanent discontinuation of bosutinib due to an adverse reaction occurred in 22% of patients with CML who were resistant or intolerant to prior therapy. Adverse reactions which resulted in permanent discontinuation in >2% of patients included thrombocytopenia (6%), hepatic dysfunction (3.3%), and neutropenia (2%). Dose modifications (dose interruption or reductions) of bosutinib due to an adverse reaction occurred in 66% of patients with CML who were resistant or intolerant to prior therapy. Adverse reactions which required dose interruptions or reductions in >5% of patients included thrombocytopenia (24%), diarrhea (14%), rash (13%), hepatic dysfunction (10%), neutropenia (9%), pleural effusion (8%), vomiting (7%), anemia (6%), and abdominal pain (6%). The most common adverse reactions, in ≥20% of patients in the safety population of the single-arm trial in patients with CML (N=546) who were resistant or intolerant to prior therapy were diarrhea (83%), nausea (47%), rash (46%), abdominal pain (45%), vomiting (39%), fatigue (33%), pyrexia (28%), hepatic dysfunction (27%), respiratory tract infection (24%), cough (23%), and headache (21%). The most common laboratory abnormalities that worsened from baseline in ≥20% were creatinine increased (93%), hemoglobin decreased (91%), lymphocyte decreased (80%), platelets decreased (69%), absolute neutrophil count (54%), ALT increased (53%), calcium decreased (53%), white blood cell count decreased (52%), urate increased (48%), AST increased (47%), phosphorus decreased (39%), alkaline phosphatase increased (39%), lipase increased (28%), magnesium increased (25%), potassium decreased (24%), potassium increased (23%). See Table 10 for Grade 3/4 laboratory abnormalities. Table 9 identifies adverse reactions greater than or equal to 10% for All Grades and Grades 3 or 4 for the Phase 1/2 CML safety population based on long-term follow-up. Table 9: Adverse Reactions (10% or Greater) in Patients With CML Who Were Resistant or Intolerant to Prior Therapy in Single-Arm Trial* System Organ Class Preferred Term CP CML N=403 AdvP CML N=143 All Grades (%) Grade 3/4 (%) All Grades (%) Grade 3/4 (%) Gastrointestinal disorders Diarrhea 85 10 76 4 Abdominal pain a 49 2 36 7 Nausea 47 1 48 2 Vomiting 38 3 43 3 Constipation 15 <1 17 1 Skin and subcutaneous tissue disorders Rash e 48 9 42 5 Pruritus 12 1 7 0 General disorders and administration-site conditions Fatigue 35 3 27 6 Pyrexia 25 1 37 3 Edema c 19 <1 17 1 Chest pain g 8 1 12 1 Hepatobiliary disorders Hepatic dysfunction h 29 11 21 10 Infections and infestations Respiratory tract infection f 27 <1 17 0 Influenza i 11 1 3 0 Pneumonia d 10 4 18 12 Respiratory, thoracic, and mediastinal disorders Cough 24 0 22 0 Pleural effusion 14 4 9 4 Dyspnea 12 2 20 6 Nervous system disorders Headache 21 1 18 4 Dizziness 11 0 14 1 Musculoskeletal and connective tissue disorders Arthralgia 19 1 15 0 Back pain 14 1 8 1 Metabolism and nutrition disorders Decreased appetite 14 1 14 0 Vascular disorders Hypertension b 11 3 8 3 ADR Definition * Based on Minimum of 105 Months of Follow-up. Adverse drug reactions are based on all-causality treatment-emergent adverse events. The commonality stratification is based on 'All Grades' under Total column. ‘Grade 3’, ‘Grade 4’ columns indicate maximum toxicity a Abdominal pain includes the following preferred terms: Abdominal discomfort, Abdominal pain, Abdominal pain lower, Abdominal pain upper, Abdominal tenderness, Dyspepsia, Epigastric discomfort, Gastrointestinal pain, Hepatic pain. g Chest pain includes the followin

Our copy of this section ends here. The full text is in the official label at the FDA. Open Drugs@FDA

Bosutinib Monohydrate

Indications

Contraindications

Warnings and precautions

Two medicines in one question?

5.1Gastrointestinal Toxicity

5.2Myelosuppression

5.3Hepatic Toxicity

5.4Cardiovascular Toxicity

5.5Fluid Retention

5.6Renal Toxicity

Interactions

7.1Effect of Other Drugs on Bosutinib Tablets Strong or Moderate CYP3A Inhibitors Avoid

Pregnancy and breastfeeding

8.1Pregnancy Risk Summary Based

Adverse reactions

6.1Clinical Trials Experience

Composition

Strengths and forms

Official product information

At a glance

Guidelines