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RX BIN: 015558
RX PCN: HT
Group ID: DDN6600
Card Holder ID: DDN6600

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2018 Price of Tagrisso

$10.510

40mg

* price without discount in nearest pharmacy. Price may vary.

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Osimertinib volume of distribution

The mean volume of distribution at steady state is 986 L.

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What is Osimertinib

Osimertinib is an oral, third-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) drug developed by AstraZeneca Pharmaceuticals. Its use is indicated for the treatment of metastatic non-small cell lung cancer (NSCLC) in cases where tumour EGFR expression is positive for the T790M mutation as detected by FDA-approved testing and which has progressed following therapy with a first-generation EGFR tyrosine kinase inhibitor. Approximately 10% of patients with NSCLC have a rapid and clinically effective response to EGFR-TKIs due to the presence of specific activating EGFR mutations within the tumour cells. More specifically, deletions around the LREA motif in exon 19 and exon 21 L858R point mutations are correlated with response to therapy. Development of third-generation EGFR-TKIs, such as osimertinib, has been in response to altered tumour resistance patterns following treatment and toxic side effects that impact patient quality of life. Treatment with first-generation EGFR-TKIs (gefitinib and erlotinib) has been associated with the development of resistance through activating mutations in the EGFR gene. Second-generation EGFR-TKIs (afatinib and dacomitinib) were then developed to be more potent inhibitors, although their use is associated with increased toxicity through nonspecific targeting of wild-type EGFR. In contrast, third-generation inhibitors are specific for the gate-keeper T790M mutations which increases ATP binding activity to EGFR and result 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.

Osimertinib mechanism of action

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 forms of Osimertinib

DrugDosageQuantityPrice
Tagrisso40mg30 Tablet$10.510
Tagrisso80mg30 Tablet$10.760
Prescription Generics

false

International Brands

Tagrisso

Synonyms

Mereletinib N-(2-{[2-(dimethylamino)ethyl](methyl)amino}-4-methoxy-5-{[4-(1-methyl-1H-indol-3-yl)pyrimidin-2-yl]amino}phenyl)prop-2-enamide

Manufacturers

Astrazeneca Canada Inc

CAS number

1421373-65-0

UNII

3C06JJ0Z2O

State

solid

Affected organisms

Indication of Osimertinib

Osimertinib is indicated for the treatment of patients with metastatic epidermal growth factor receptor (EGFR) T790M mutation-positive non-small cell lung cancer (NSCLC), as detected by an FDA- approved test, who have progressed on or after EGFR-TKI therapy.

Toxicity of Osimertinib

Across clinical trials, interstitial lung disease (ILD)/pneumonitis occurred in 3.3% of treated patients with 0.5% of these being fatal. There is also a change of QTc interval prolongation; electrocardiogram and electrolytes should be monitored in patients with a history or predisposition for QTc prolongation. Cardiomyopathy occurred in 1.4% of patients, therefore left ventricular ejection fraction (LVEF) should be measured at baseline and then every 3 months during treatment. Osimertinib can cause embryo-fetal toxicity, requiring female patients to take effective birth control during therapy and for 6 weeks after final dose.

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