Generic drug: osimertinib

Brand name: Tagrisso

What is Tagrisso (osimertinib), and how does it work?

Tagrisso (osimertinib) is a prescription medicine used to treat adults with non-small cell lung cancer (NSCLC) that has certain abnormal epidermal growth factor receptor (EGFR) gene(s):

  • to help prevent your lung cancer from coming back after your tumor(s) has been removed by surgery, or
  • as your first treatment when your lung cancer has spread to other parts of the body (metastatic), or
  • when your lung cancer has spread to other parts of the body (metastatic) and you have had previous treatment with an EGFR tyrosine kinase inhibitor (TKI) medicine that did not work or is no longer working.

Your healthcare provider will perform a test to make sure that Tagrisso is right for you.

It is not known if Tagrisso is safe and effective in children.

What are the side effects of Tagrisso?

Tagrisso may cause serious side effects, including:

  • lung problems. Tagrisso may cause lung problems that may lead to death. Symptoms may be similar to those symptoms from lung cancer. Tell your healthcare provider right away if you have any new or worsening lung symptoms, including trouble breathing, shortness of breath, cough, or fever.
  • heart problems, including heart failure. Tagrisso may cause heart problems that may lead to death. Your healthcare provider should check your heart function before you start taking Tagrisso and during treatment as needed.
  • severe blistering or peeling of skin. Seek medical attention right away if you develop these symptoms.
  • target lesions, which are skin reactions that look like rings. Seek medical attention right away if you develop these symptoms.

The most common side effects of Tagrisso are:

Tell your healthcare provider if you have any side effect that bothers you or that does not go away.

These are not all the possible side effects of Tagrisso. For more information, ask your healthcare provider or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800FDA-1088. 

What is the dosage for Tagrisso?

First-line Treatment Of EGFR Mutation-Positive Metastatic NSCLC

  • Tagrisso is indicated for the first-line treatment of adult patients with metastatic NSCLC whose tumors have EGFR exon 19 deletions or exon 21 L858R mutations, as detected by an FDA-approved test.
  • Previously Treated EGFR T790M Mutation-Positive Metastatic NSCLC

  • Tagrisso is indicated for the treatment of adult patients with metastatic EGFR T790M mutation-positive NSCLC, as detected by an FDA-approved test, whose disease has progressed on or after EGFR tyrosine kinase inhibitor (TKI) therapy.
  • Patient Selection

  • Select patients with resectable tumors for the adjuvant treatment of NSCLC with Tagrisso based on the presence of EGFR exon 19 deletions or exon 21 L858R mutations in tumor specimens.
  • Select patients for the first-line treatment of metastatic EGFR-positive NSCLC with Tagrisso based on the presence of EGFR exon 19 deletions or exon 21 L858R mutations in tumor or plasma specimens. If these mutations are not detected in a plasma specimen, test tumor tissue if feasible.
  • Select patients for the treatment of metastatic EGFR T790M mutation-positive NSCLC with Tagrisso following progression on or after EGFR TKI therapy based on the presence of an EGFR T790M mutation in tumor or plasma specimens.
  • Testing for the presence of the T790M mutation in plasma specimens is recommended only in patients for whom a tumor biopsy cannot be obtained. If this mutation is not detected in a plasma specimen, re-evaluate the feasibility of biopsy for tumor tissue testing.
  • Information on FDA-approved tests for the detection of EGFR mutations is available at
  • Recommended Dosage Regimen

  • The recommended dosage of Tagrisso is 80 mg tablet once a day. Tagrisso can be taken with or without food.
  • If a dose of Tagrisso is missed, do not make up the missed dose and take the next dose as scheduled.
  • Treat patients in the adjuvant setting until disease recurrence, or unacceptable toxicity, or for up to 3 years.
  • Treat patients with metastatic lung cancer until disease progression or unacceptable toxicity.
  • Administration To Patients Who Have Difficulty Swallowing Solids

  • Disperse tablet in 60 mL (2 ounces) of non-carbonated water only.
  • Stir until tablet is dispersed into small pieces (the tablet will not completely dissolve) and swallow immediately.
  • Do not crush, heat, or ultrasonicate during preparation. Rinse the container with 120 mL to 240 mL (4 to 8 ounces) of water and immediately drink.
  • If administration via nasogastric tube is required, disperse the tablet as above in 15 mL of non-carbonated water, and then use an additional 15 mL of water to transfer any residues to the syringe.
  • The resulting 30 mL liquid should be administered as per the nasogastric tube instructions with appropriate water flushes (approximately 30 mL).
  • Dosage Modifications

    Adverse Reactions

    Table 1: Recommended Dosage Modifications for Tagrisso

    Target OrganAdverse Reaction*Dosage Modification
    PulmonaryInterstitial lung disease (ILD)/Pneumonitis sPermanently discontinue Tagrisso.
    CardiacQTc† interval greater than 500 msec on at least 2 separate ECGs‡Withhold Tagrisso until QTc interval is less than 481 msec or recovery to baseline if baseline QTc is greater than or equal to 481 msec, then resume at 40 mg dose.
    QTc interval prolongation with signs/symptoms of life-threatening arrhythmiaPermanently discontinue Tagrisso.
    Symptomatic congestive heart failurePermanently discontinue Tagrisso.
    CutaneousStevens-Johnson syndrome (SJS), Erythema Multiforme Major (EMM)Withhold Tagrisso if suspected and permanently discontinue if confirmed.
    OtherAdverse reaction of Grade 3 or greater severityWithhold Tagrisso for up to 3 weeks.
    If improvement to Grade 0-2 within 3 weeksResume at 80 mg or 40 mg daily.
    If no improvement within 3 weeksPermanently discontinue Tagrisso.
    *Adverse reactions graded by the National Cancer Institute Common Terminology Criteria for Adverse Events version 4.0 (NCI CTCAE v4.0).
    †QTc = QT interval corrected for heart rate
    ‡ECGs = Electrocardiogram

    Drug Interactions

    Strong CYP3A4 Inducers
  • If concurrent use is unavoidable, increase Tagrisso dosage to 160 mg daily when co-administering with a strong CYP3A inducer. Resume Tagrisso at 80 mg 3 weeks after discontinuation of the strong CYP3A4 inducer.


Lung Cancer: Early Signs, Symptoms, Stages See Slideshow

What drugs interact with Tagrisso?

Effect Of Other Drugs On Osimertinib

Strong CYP3A Inducers
  • Co-administering Tagrisso with a strong CYP3A4 inducer decreased the exposure of osimertinib compared to administering Tagrisso alone. Decreased osimertinib exposure may lead to reduced efficacy.
  • Avoid co-administering Tagrisso with strong CYP3A inducers. Increase the Tagrisso dosage when co-administering with a strong CYP3A4 inducer if concurrent use is unavoidable. No dose adjustments are required when Tagrisso is used with moderate and/or weak CYP3A inducers.

Effect Of Osimertinib On Other Drugs

  • Co-administering Tagrisso with a breast cancer-resistant protein (BCRP) or P-glycoprotein (P-gp) substrate increased the exposure of the substrate compared to administering it alone.
  • Increased BCRP or P-gp substrate exposure may increase the risk of exposure-related toxicity.
  • Monitor for adverse reactions of the BCRP or P-gp substrate, unless otherwise instructed in its approved labeling, when co-administered with Tagrisso.

Drugs That Prolong The QTc Interval

  • The effect of co-administering medicinal products known to prolong the QTc interval with Tagrisso is unknown.
  • When feasible, avoid concomitant administration of drugs known to prolong the QTc interval with known risk of Torsades de pointes.
  • If not feasible to avoid concomitant administration of such drugs, conduct periodic ECG monitoring.

Is Tagrisso safe to use while pregnant or breastfeeding?

  • Based on data from animal studies and its mechanism of action, Tagrisso can cause fetal harm when administered to a pregnant woman.
  • There are no available data on Tagrisso use in pregnant women.
  • There are no data on the presence of osimertinib or its active metabolites in human milk, the effects of osimertinib on the breastfed infant or on milk production.
  • Treatment & Diagnosis

    Medications & Supplements

    Prevention & Wellness


    Lung cancer is a disease in which lung cells grow abnormally in an uncontrolled way. See Answer

    Health Solutions From Our Sponsors

    FDA Logo

    Report Problems to the Food and Drug Administration

    You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

    Medically Reviewed on 3/8/2021
    All sections courtesy of the U.S. Food and Drug Administration