Alecensa as monotherapy is indicated for the first-line treatment of adult patients with anaplastic lymphoma kinase (ALK)-positive advanced non-small cell lung cancer (NSCLC). Alecensa as monotherapy is indicated for the treatment of adult patients with ALK-positive advanced NSCLC previously treated with crizotinib.
Alectinib is a highly selective and potent ALK and RET tyrosine kinase inhibitor.In nonclinicalstudies, inhibition of ALK tyrosine kinase activity led to blockage of downstream signaling pathways including STAT 3 and PI3K/AKT and inducedtumor cell death (apoptosis). Alectinib demonstratedin vitroand in vivoactivity against mutant forms of the ALK enzyme, including mutations responsible forresistance to crizotinib.The major metabolite of alectinib (M4) has shown similar in vitropotency and activity. Based on nonclinicaldata, alectinib is not a substrate of p-glycoprotein (P-gp) or breast cancer resistance protein (BCRP), which are both efflux transporters in the blood brain barrier, and is therefore able to distribute into and be retained within the central nervous system. Alectinibinducedtumor regressionin nonclinicalmousexenograft models, including antitumor activity in the brain, and prolonged survival inintracranial tumor animal models.
Recommended dose : Alectinib is 600 mg (four 150 mg capsules) taken twice daily with food (total daily dose of 1200 mg). Patients with underlying severe hepatic impairment (Child-Pugh C) should receive a starting dose of 450 mg taken twice daily with food (total daily dose of 900 mg). Duration of treatment : Treatment with Alectinib should be continued until disease progression or unacceptable toxicity. Delayed or missed doses : If a planned dose of Alectinib is missed, patients can make up that dose unless the next dose is due within 6 hours. Patients should not take two doses at the same time to make up for a missed dose. If vomiting occurs after taking a dose of Alectinib , patients should take the next dose at the scheduled time. Dose adjustments : Management of adverse events may require dose reduction, temporary interruption, or discontinuation of treatment with Alectinib. The dose of Alectinib should be reduced in steps of 150 mg twice daily based on tolerability. Alectinib treatment should be permanently discontinued if patients are unable to tolerate the 300 mg twice daily dose. Method of administration : Alectinib is for oral use. The hard capsules should be swallowed whole, and must not be opened or dissolved. They must be taken with food.
Always consult a registered doctor before taking any medicine. This information is for general knowledge only.
The most common adverse drug reactions were constipation, edema including peripheral, generalized, eyelid, periorbital; myalgia (31% including myalgia and musculoskeletal pain), nausea, increased bilirubin (21% including increased blood bilirubin, hyperbilirubinemia and increased bilirubin conjugated), anemia (20%, including anemia and hemoglobin decreased), and rash (20%, including rash, rash maculopapular, dermatitis acneiform, erythema, rash generalized, rash papular, rash pruritic and rash macular).
Alectinib is contraindicated in patients with a known hypersensitivity to alectinib or any of the excipients.
Based on in vitro data, CYP3A4 is the primary enzyme mediating the metabolism of both Alecensa and its major active metabolite M4, and CYP3A contributes to 40% - 50% of total hepatic metabolism. M4 has shown similar in vitro potency and activity against ALK. CYP3A inducers : Co-administration of multiple oral doses of 600 mg rifampicin once daily, a strong CYP3A inducer, with a single oral dose of 600 mg Alecensa reduced Alecensa Cmax, and AUCinf by 51% and 73% respectively and increased M4 Cmax and AUCinf 2.20 and 1.79-fold respectively. The effect on the combined exposure of Alecensa and M4 was minor, reducing Cmax and AUCinf by 4% and 18%, respectively. Based on the effects on the combined exposure of Alecensa and M4, no dose adjustments are required when Alecensa is co-administered with CYP3A inducers. Appropriate monitoring is recommended for patients taking concomitant strong CYP3A inducers (including, but not limited to, carbamazepine, phenobarbital, phenytoin, rifabutin, rifampicin and St. John's Wort (Hypericum perforatum). CYP3A inhibitors : Co-administration of multiple oral doses of 400 mg posaconazole twice daily, a strong CYP3A inhibitor, with a single oral dose of 300 mg Alecensa increased Alecensa exposure Cmax and AUCinf by 1.18 and 1.75-fold respectively, and reduced M4 Cmax and AUCinf by 71% and 25% respectively. The effect on the combined exposure of Alecensa and M4 was minor, reducing Cmax by 7% and increasing AUCinf 1.36-fold. Based on the effects on the combined exposure of Alecensa and M4, no dose adjustments are required when Alecensa is co-administered with CYP3A inhibitors. Appropriate monitoring is recommended for patients taking concomitant strong CYP3A inhibitors (including, but not limited to, ritonavir, saquinavir, telithromycin, ketoconazole, itraconazole, voriconazole, posaconazole nefazodone, grapefruit or Seville oranges). Medicinal products that increase gastric pH : Multiple doses of esomeprazole, a proton pump inhibitor, 40 mg once daily, demonstrated no clinically relevant effect on the combined exposure of Alecensa and M4. Therefore, no dose adjustments are required when Alecensa is co-administered with proton pump inhibitors or other medicinal products which raise gastric pH (e.g. H2 receptor antagonists or antacids). Effect of transporters on Alecensa disposition : M4 is a substrate of P-gp. As Alecensa inhibits P-gp, it is not expected that co-medication with P-gp inhibitors has a relevant effect on M4 exposure.
Interstitial lung disease (ILD)/pneumonitis : Cases of ILD/pneumonitishave been reported in clinical trials with Alecensa. Patients should be monitored for pulmonary symptoms indicative of pneumonitis. Alecensa should be immediately interrupted in patients diagnosed with ILD/pneumonitis and should be permanently discontinued if no other potential causes of ILD/pneumonitis have been identified Hepatotoxicity : Elevations in alanine amino transferase (ALT) and aspartate amino transferase (AST) greater than 5 times the upper limit of normal (ULN) as well as bilirubin elevations of more than 3 times the ULN occurred in patients in pivotal clinical trials with Alecensa. The majority of these events occurred during the first 3months of treatment. In the pivotal Alecensa clinical trials it was reported that three patients with Grade 3‒4 AST/ALT elevations had drug-induced liver injury. Concurrent elevations in ALT or AST greater than or equal to three times the ULN and total bilirubin greater than or equal to two times the ULN, with normal alkaline phosphatase, occurred in 1 patient treated in Alecensa clinical trials. Bradycardia : Symptomatic bradycardia can occur with Alecensa. Heart rate and blood pressure should be monitored as clinically indicated. Dose modification is not required in case of asymptomatic bradycardia. If patients experience symptomatic bradycardia or life-threatening events, concomitant medicinal products known to cause bradycardia, as well as anti-hypertensive medicinal products should be evaluated and Alecensa treatment should be adjusted. Photosensitivity : Photosensitivity to sunlight has been reported with Alecensa administration. Patients should be advised to avoid prolonged sun exposure while taking Alecensa, and for at least 7 days after discontinuation of treatment. Patients should also be advised to use a broad-spectrum Ultraviolet A (UVA)/ Ultraviolet B (UVB) sun screen and lip balm (SPF >50) to help protect against potential sunburn. Women of child-bearing potential : Alecensa may cause foetal harm when administered to a pregnant woman. Female patients of child-bearing potential receiving Alecensa, must use highly effective contraceptive methods during treatment and for at least 3 months following the last dose of Alecensa. Lactose intolerance : This medicinal product contains lactose. Patients with rare hereditary problems of galactose intolerance, a congenital lactase deficiency or glucose-galactose malabsorption should not take this medicinal product. Sodium content : This medicinal product contains 48 mg sodium per daily dose (1200 mg), equivalent to 2.4% of the WHO recommended maximum daily intake of 2 g sodium for an adult.