Generic
Osimertinib
Pharmacology
Osimertinib is an epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) that binds to certain mutant forms of EGFR (T790M, L858R, and exon 19 deletion) that predominate in non-small cell lung cancer (NSCLC) tumours following treatment with first-line EGFR-TKIs. As a third-generation tyrosine kinase inhibitor, osimertinib is specific for the gate-keeper T790M mutation which increases ATP binding activity to EGFR and results in poor prognosis for late-stage disease. Furthermore, osimertinib has been shown to spare wild-type EGFR during therapy, thereby reducing non-specific binding and limiting toxicity.
Dosage Administration
The recommended dose of Osimertinib is 80 mg once a day until disease progression or unacceptable toxicity. Osimertinib can be taken with or without food. If a dose of Osimertinib is missed, do not make up the missed dose and take the next dose as scheduled.
Contraindications
Strong CYP3A4 Inducers: If concurrent use is unavoidable, increase Osimertinib dosage to 160 mg daily when coadministering with a strong CYP3A inducer. Resume Osimertinib at 80 mg 3 weeks after discontinuation of the strong CYP3A4 inducer
Side Effects
Strong CYP3A4 Inducers: If concurrent use is unavoidable, increase Osimertinib dosage to 160 mg daily when coadministering with a strong CYP3A inducer. Resume Osimertinib at 80 mg 3 weeks after discontinuation of the strong CYP3A4 inducer
Pregnancy And Lactation
Use in Pregnancy: There are no or limited amount of data from the use of Osimertinib in pregnant women. Studies in animals have shown reproductive toxicity. Based on its mechanism of action and preclinical data, Osimertinib may cause foetal harm when administered to a pregnant woman. Administration of osimertinib to pregnant rats was associated with embryolethality, reduced foetal growth and neonatal death at exposures similar to what is expected in humans. Osimertinib is not recommended during pregnancy and in women of childbearing potential not using contraception. Use in Lactation: It is not known whether osimertinib or its metabolites are excreted in human milk. Administration to rats during gestation and early lactation was associated with adverse effects, including reduced growth rates and neonatal death. There is insufficient information on the excretion of osimertinib or its metabolites in animal milk. A risk to the suckling child cannot be excluded. Breast-feeding should discontinue during treatment with Osimertinib. Fertility: There are no data on the effect of Osimertinib on human fertility. Results from animal studies have shown that Osimertinib has effects on male and female reproductive organs and could impair fertility
Therapeutic
Store Osimertinib at room temperature between 20°C to 25°C. Safely throw away medicine that is out of date or that you no longer need. Keep Osimertinib and all medicines out of the reach of children.
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