Description
Indications
Pharmacology
Absorption: Following administration of single oral doses of Brigatinib of 30 to 240 mg, the median time to peak concentration (Tmax) ranged from 1 to 4 hours.
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 Brigatinib 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 Brigatinib 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.
Dosage & Administration
- 90 mg orally once daily for the first 7 days;
- If 90 mg is tolerated during the first 7 days, the dose should be increased to 180 mg orally once daily.
Brigatinib should be administered until disease progression or unacceptable toxicity. If Brigatinib is interrupted for 14 days or longer for reasons other than adverse reactions, treatment should be resumed at 90 mg once daily for 7 days before increasing to the previously tolerated dose. Brigatinib may be taken with or without food. Patients should be instructed to swallow tablets whole. Tablets should not be crushed or chewed. If a dose of Brigatinib is missed or vomiting occurs after taking a dose, an additional dose should not be administered and take the next dose of Brigatinib should be taken at the scheduled time.
Pediatric Use: The safety and efficacy of Brigatinib in pediatric patients have not been established.
Interaction
Drugs that may Decrease Brigacent Plasma Concentrations: Strong CYP3A Inducers: Coadministration of Brigacent with Rifampin, a strong CYP3A inducer, decreased Brigacent plasma concentrations and may result in decreased efficacy. Concomitant use of strong CYP3A inducers with Brigacent should be avoided, including but not limited to Rifampin, Carbamazepine, Phenytoin, and St. John’s Wort.
Drugs that may have their Plasma Concentrations altered by Brigacent: CYP3A Substrates: Brigacent 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.
Contraindications
Side Effects
- Interstitial Lung Disease (ILD)/Pneumonitis
- Hypertension
- Bradycardia
- Visual Disturbance
- Creatine Phosphokinase (CPK) Elevation
- Pancreatic Enzyme Elevation
- Hyperglycemia
Pregnancy & Lactation
Lactation: 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, lactating women should be advised not to breastfeed during treatment with Brigatinib and for 1 week following the final dose.
Females Reproductive Potential: Females of reproductive potential should be advised to use effective non-hormonal contraception during treatment with Brigatinib and for at least 4 months after the final dose. Patients should be counseled to use a non-hormonal method of contraception since Brigatinib can render some hormonal contraceptives ineffective.
Males Reproductive Potential: Because of the potential for genotoxicity, males with female partners of reproductive potential should be advised to use effective contraception during treatment with Brigatinib and for at least 3 months after the final dose.
Infertility: Based on findings in male reproductive organs in animals, Brigatinib may cause reduced fertility in males.
Precautions & Warnings
Hypertension: Hypertension was reported in 11% of patients in the 90 mg group who received Brigacent and 21% of patients in the 90-180 mg group. Grade 3 hypertension occurred in 5.9% of patients overall. Blood pressure should be controlled prior to treatment with Brigacent. Blood pressure should be monitored after 2 weeks and at least monthly thereafter during treatment with Brigacent. It should be withheld for Grade 3 hypertension despite optimal antihypertensive therapy. Permanent discontinuation of treatment should be considered with Brigacent for Grade 4 hypertension or recurrence of Grade 3 hypertension. Caution should be used when administering Brigacent in combination with antihypertensive agents that cause bradycardia.
Bradycardia: Bradycardia can occur with Brigacent. Heart rate and blood pressure should be monitored during treatment with Brigacent. Patients should be monitored more frequently if concomitant use of drug known to cause bradycardia cannot be avoided.
Visual Disturbance: Adverse reactions leading to visual disturbance including blurred vision, diplopia, and reduced visual acuity, were reported in 7.3% of patients receiving Brigacent in the 90 mg group and 10% of patients in the 90-180 mg group. Patients should be advised to report any visual symptoms. Brigacent should be withheld and obtained an ophthalmologic evaluation in patients with new or worsening visual symptoms of Grade 2 or greater severity. Upon recovery of Grade 2 or Grade 3 visual disturbances to Grade 1 severity or baseline, Brigacent should be resumed at a reduced dose. Treatment with Brigacent should be permanently discontinued for Grade 4 visual disturbances.
Creatine Phosphokinase (CPK) Elevation: Creatine phosphokinase (CPK) elevation occurred in 27% of patients receiving Brigacent in the 90 mg group and 48% of patients in the 90 mg-180 mg group. Patients should be advised to report any unexplained muscle pain, tenderness, or weakness. CPK levels should be monitored during Brigacent treatment. Brigacent should be withheld for Grade 3 or 4 CPK elevation.
Pancreatic Enzyme Elevation: Amylase elevation occurred in 27% of patients in the 90 mg group and 39% of patients in the 90→180 mg group. Lipase elevations occurred in 21% of patients in the 90 mg group and 45% of patients in the 90→180 mg group. Lipase and amylase should be monitored during treatment with Brigacent. Brigacent should be withheld for Grade 3 or 4 pancreatic enzyme elevation.
Hyperglycemia: 43% of patients who received Brigacent experienced new or worsening hyperglycemia. Grade 3 hyperglycemia, based on laboratory assessment of serum fasting glucose levels, occurred in 3.7% of patients. Two of 20 (10%) patients with diabetes Brigacent or glucose intolerance at baseline required initiation of insulin while receiving Brigacent. Fasting serum glucose should be assessed prior to initiation of Brigacent and monitored periodically thereafter. Antihyperglycemic medications should be initiated or optimized as needed. If adequate hyperglycemic control cannot be achieved with optimal medical management, Brigacent should be withheld until adequate hyperglycemic control is achieved and considered reducing the dose of Brigacent.





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