Strong CYP3A Inhibitors
Coadministration of itraconazole, a strong CYP3A inhibitor, increased brigatinib plasma concentrations and may result in increased adverse reactions [see Clinical Pharmacology (12.3)]. Avoid the concomitant use of strong CYP3A inhibitors with ALUNBRIG, including but not limited to certain antivirals (e.g., boceprevir, cobicistat, indinavir, lopinavir, nelfinavir, ritonavir, saquinavir), macrolide antibiotics (e.g., clarithromycin), antifungals (e.g., itraconazole, ketoconazole, posaconazole, voriconazole), and conivaptan. Avoid grapefruit or grapefruit juice as it may also increase plasma concentrations of brigatinib [see Clinical Pharmacology (12.3)]. If concomitant use of a strong CYP3A inhibitor cannot be avoided, reduce the dose of ALUNBRIG by approximately 50% [see Dosage and Administration (2.3)].
Strong CYP3A Inducers
Coadministration of ALUNBRIG with rifampin, a strong CYP3A inducer, decreased brigatinib plasma concentrations and may result in decreased efficacy [see Clinical Pharmacology (12.3)]. Avoid the concomitant use of strong CYP3A inducers with ALUNBRIG, including but not limited to rifampin, carbamazepine, phenytoin, and St. John's Wort [see Clinical Pharmacology (12.3)].
CYP3A Substrates
Brigatinib induces CYP3A in vitro and may decrease concentrations of CYP3A substrates. Coadministration of ALUNBRIG with CYP3A substrates, including hormonal contraceptives, can result in decreased concentrations and loss of efficacy of CYP3A substrates [see Use in Specific Populations (8.3)].
Risk Summary
Based on its mechanism of action and findings in animals, ALUNBRIG can cause fetal harm when administered to a pregnant woman [see Data and Clinical Pharmacology (12.1)]. There are no clinical data on the use of ALUNBRIG in pregnant women. Administration of brigatinib to pregnant rats during the period of organogenesis resulted in dose-related skeletal anomalies at doses as low as 12.5 mg/kg/day (approximately 0.7 times the human exposure by AUC at 180 mg once daily) as well as increased post-implantation loss, malformations, and decreased fetal body weight at doses of 25 mg/kg/day (approximately 1.26 times the human exposure at 180 mg once daily) or greater. If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, advise the patient of the potential risk to a fetus.
In the U.S. 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.
Data
Animal Data
In an embryo-fetal development study in which pregnant rats were administered daily doses of brigatinib during organogenesis, dose-related skeletal (incomplete ossification, small incisors) and visceral anomalies were observed at doses as low as 12.5 mg/kg/day (approximately 0.7 times the human exposure by AUC at 180 mg once daily). Malformations observed at 25 mg/kg/day (approximately 1.26 times the human AUC at 180 mg once daily) included anasarca (generalized subcutaneous edema), anophthalmia (absent eyes), forelimb hyperflexion, small, short and/or bent limbs, multiple fused ribs, bent scapulae, omphalocele (intestine protruding into umbilicus), and gastroschisis (intestines protruding through a defect in the abdominal wall) along with visceral findings of moderate bilateral dilatation of the lateral ventricles.
Risk Summary
There are no data regarding the secretion of brigatinib in human milk or its effects on the breastfed infant or milk production. Because of the potential for adverse reactions in breastfed infants, advise lactating women not to breastfeed during treatment with ALUNBRIG and for one week following the final dose.
Contraception
ALUNBRIG can cause fetal harm [see Use in Specific Populations (8.1)].
Females
Advise females of reproductive potential to use effective non-hormonal contraception during treatment with ALUNBRIG and for at least four months after the final dose. Counsel patients to use a non-hormonal method of contraception since ALUNBRIG can render some hormonal contraceptives ineffective [see Drug Interactions (7.3)].
Males
Because of the potential for genotoxicity, advise males with female partners of reproductive potential to use effective contraception during treatment with ALUNBRIG and for at least three months after the final dose [see Nonclinical Toxicology (13.1)].
Infertility
Based on findings in male reproductive organs in animals, ALUNBRIG may cause reduced fertility in males [see Nonclinical Toxicology (13.1)].
Cardiac Electrophysiology
The QT interval prolongation potential of ALUNBRIG was assessed in 123 patients following once daily ALUNBRIG doses of 30 mg (1/6th of the approved 180 mg dose) to 240 mg (1.3 times the approved 180 mg dose). ALUNBRIG did not prolong the QT interval to a clinically relevant extent.
Absorption
Following administration of single oral doses of ALUNBRIG of 30 to 240 mg, the median time to peak concentration (Tmax) ranged from one to four hours.
Effect of Food
Brigatinib Cmax was reduced by 13% with no effect on AUC in healthy subjects administered ALUNBRIG after a high fat meal (approximately 920 calories, 58 grams carbohydrate, 59 grams fat and 40 grams protein) compared to the Cmax and AUC after overnight fasting.
Distribution
Brigatinib is 66% bound to human plasma proteins and the binding is not concentration-dependent in vitro. The blood-to-plasma concentration ratio is 0.69. Following oral administration of ALUNBRIG 180 mg once daily, the mean apparent volume of distribution (Vz/F) of brigatinib at steady-state was 153 L.
Elimination
Following oral administration of ALUNBRIG 180 mg once daily, the mean apparent oral clearance (CL/F) of brigatinib at steady-state is 12.7 L/h and the mean plasma elimination half-life is 25 hours.
Metabolism
Brigatinib is primarily metabolized by CYP2C8 and CYP3A4 in vitro. Following oral administration of a single 180 mg dose of radiolabeled brigatinib to healthy subjects, N-demethylation and cysteine conjugation were the two major metabolic pathways. Unchanged brigatinib (92%) and its primary metabolite, AP26123 (3.5%), were the major circulating radioactive components. The steady-state AUC of AP26123 was less than 10% of AUC of brigatinib exposure in patients. The metabolite, AP26123, inhibited ALK with approximately 3-fold lower potency than brigatinib in vitro.
Excretion
Following oral administration of a single 180 mg dose of radiolabeled brigatinib to healthy subjects, 65% of the administered dose was recovered in feces and 25% of the administered dose was recovered in urine. Unchanged brigatinib represented 41% and 86% of the total radioactivity in feces and urine, respectively.
Specific Populations
Age, race, sex, body weight, and albumin concentration have no clinically meaningful effect on the pharmacokinetics of brigatinib.
Hepatic Impairment
As hepatic elimination is a major route of excretion for brigatinib, hepatic impairment may result in increased plasma brigatinib concentrations. Based on a population pharmacokinetic analysis, brigatinib exposures were similar between 49 subjects with mild hepatic impairment (total bilirubin within upper limit of normal [ULN] and AST greater than ULN or total bilirubin greater than one and up to 1.5 times ULN and any AST) and 377 subjects with normal hepatic function (total bilirubin and AST within ULN). The pharmacokinetics of brigatinib in patients with moderate (total bilirubin greater than 1.5 and up to 3.0 times ULN and any AST) to severe (total bilirubin greater than 3.0 times ULN and any AST) hepatic impairment has not been studied.
Renal Impairment
Based on a population pharmacokinetic analysis, brigatinib exposures were similar among 125 subjects with mild renal impairment (CLcr 60 to less than 90 mL/min), 34 subjects with moderate renal impairment (CLcr 30 to less than 60 mL/min) and 270 subjects with normal renal function (CLcr greater than or equal to 90 mL/min), suggesting that no dose adjustment is necessary in patients with mild to moderate renal impairment. Patients with severe renal impairment (CLcr less than 30 mL/min) were not included in clinical trials.
Drug Interactions
Effects of Other Drugs on Brigatinib
Strong CYP3A Inhibitors
Coadministration of 200 mg twice daily doses of itraconazole (a strong CYP3A inhibitor) with a single 90 mg dose of ALUNBRIG increased brigatinib Cmax by 21% and AUC0-INF by 101%, relative to a 90 mg dose of ALUNBRIG administered alone [see Dosage and Administration (2.3) and Drug Interactions (7.1)].
Strong CYP2C8 Inhibitors
Coadministration of 600 mg twice daily doses of gemfibrozil (a strong CYP2C8 inhibitor) with a single 90 mg dose of ALUNBRIG decreased brigatinib Cmax by 41% and AUC0-INF by 12%, relative to a 90 mg dose of ALUNBRIG administered alone. The effect of gemfibrozil on the pharmacokinetics of brigatinib is not clinically meaningful and the underlying mechanism for the decreased exposure of brigatinib is unknown.
Strong CYP3A Inducers
Coadministration of 600 mg daily doses of rifampin (a strong CYP3A inducer) with a single 180 mg dose of ALUNBRIG decreased brigatinib Cmax by 60% and AUC0-INF by 80%, relative to a 180 mg dose of ALUNBRIG administered alone [see Drug Interactions (7.2)].
P-gp and BCRP Inhibitors
In vitro studies suggest that brigatinib is a substrate of the efflux transporters P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP). Given that brigatinib exhibits high solubility and high permeability in vitro, P-gp and BCRP inhibitors are unlikely to increase plasma concentrations of brigatinib.
Other Transporters
Brigatinib is not a substrate of organic anion transporting polypeptide (OATP1B1, OATP1B3), organic anion transporter (OAT1, OAT3), organic cation transporter (OCT1, OCT2), multidrug and toxin extrusion protein (MATE1, MATE2K), or bile salt export pump (BSEP).
Effects of Brigatinib on Other Drugs
Transporter Substrates
Brigatinib is an inhibitor of P-gp, BCRP, OCT1, MATE1, and MATE2K in vitro. Therefore, brigatinib may have the potential to increase concentrations of coadministered substrates of these transporters. Brigatinib at clinically relevant concentrations did not inhibit OATP1B1, OATP1B3, OAT1, OAT3, OCT2 or BSEP.
CYP Substrates
Brigatinib and its primary metabolite, AP26123, did not inhibit CYP1A2, 2B6, 2C8, 2C9, 2C19, 2D6, or 3A4/5 at clinically relevant concentrations.
Brigatinib, at clinically relevant plasma concentrations, induced CYP3A via activation of the pregnane X receptor (PXR). Brigatinib may also induce CYP2C enzymes via the same mechanism at clinically relevant concentrations.
Interstitial Lung Disease (ILD)/Pneumonitis
Inform patients of the symptoms and risks of serious pulmonary adverse reactions such as ILD/pneumonitis. Advise patients to immediately report any new or worsening respiratory symptoms [see Warnings and Precautions (5.1)].
Hypertension
Advise patients of risks of hypertension and to promptly report signs or symptoms of hypertension [see Warnings and Precautions (5.2)].
Bradycardia
Advise patients to report any symptoms of bradycardia and to inform their healthcare provider about the use of heart and blood pressure medications [see Warnings and Precautions (5.3)].
Visual Disturbance
Advise patients to inform their healthcare provider of any new or worsening vision symptoms [see Warnings and Precautions (5.4)].
Creatine Phosphokinase (CPK) Elevation
Inform patients of the signs and symptoms of creatinine phosphokinase (CPK) elevation and the need for monitoring during treatment. Advise patients to inform their healthcare provider of any new or worsening symptoms of unexplained muscle pain, tenderness, or weakness [see Warnings and Precautions (5.5)].
Pancreatic Enzyme Elevation
Inform patients of the signs and symptoms of pancreatitis and the need to monitor for amylase and lipase elevations during treatment [see Warnings and Precautions (5.6)].
Hyperglycemia
Inform patients of the risks of new or worsening hyperglycemia and the need to periodically monitor glucose levels. Advise patients with diabetes mellitus or glucose intolerance that antihyperglycemic medications may need to be adjusted during treatment with ALUNBRIG [see Warnings and Precautions (5.7)].
Females and Males of Reproductive Potential
Embryo-Fetal Toxicity
Advise females and males of reproductive potential that ALUNBRIG can cause fetal harm [see Warnings and Precautions (5.8) and Use in Specific Populations (8.1)].
- Advise females of reproductive potential to inform their healthcare provider of a known or suspected pregnancy and to use effective non-hormonal contraception during treatment with ALUNBRIG and for at least four months after the final dose [see Use in Specific Populations (8.3)].
- Advise males with female partners of reproductive potential to use effective contraception during treatment with ALUNBRIG and for at least three months after the final dose [see Use in Specific Populations (8.3)].
Lactation
Advise females not to breastfeed during treatment with ALUNBRIG and for at least one week following the final dose [see Use in Specific Populations (8.2)].
Infertility
Advise males of reproductive potential of the potential for reduced fertility from ALUNBRIG [see Use in Specific Populations (8.3) and Nonclinical Toxicology (13.1)].
Drug Interactions
Advise patients to inform their healthcare provider of all concomitant medications, including prescription medicines, over-the-counter drugs, vitamins, and herbal products. Inform patients to avoid grapefruit or grapefruit juice while taking ALUNBRIG [see Drug Interactions (7)].
Dosing and Administration
Instruct patients to start with 90 mg of ALUNBRIG once daily for the first seven days and if tolerated, increase the dose to 180 mg once daily. Advise patients to take ALUNBRIG with or without food [see Dosage and Administration (2.1)].
Missed Dose
Advise patients that if a dose of ALUNBRIG is missed or if the patient vomits after taking a dose of ALUNBRIG, not to take an extra dose, but to take the next dose at the regular time [see Dosage and Administration (2.1)].
Manufactured for:
Takeda Pharmaceutical Company Limited
40 Landsdowne Street, Cambridge, MA 02139-4234
ALUNBRIG® is a registered trademark of ARIAD Pharmaceuticals, Inc., a wholly owned subsidiary of Takeda Pharmaceutical Company Limited.
©2017-2018 ARIAD Pharmaceuticals, Inc. All rights reserved.
ABG346 R1