

Tagrisso is a prescription-targeted cancer medicine used to treat certain types of non-small cell lung cancer (NSCLC) with specific genetic mutations in the epidermal growth factor receptor (EGFR) gene. It belongs to a class of medications known as tyrosine kinase inhibitors (TKIs), which block signals that promote cancer cell growth and division. Unlike traditional chemotherapy, Tagrisso focuses on cancer cells with specific mutations, helping reduce damage to healthy cells. This targeted approach may improve treatment outcomes and may reduce some side effects associated with chemotherapy.
Doctors prescribe Tagrisso tablets for patients whose tumors carry EGFR mutations, most commonly exon 19 deletions or exon 21 L858R mutations. It may also be used in patients whose tumors develop the EGFR T790M resistance mutation after earlier EGFR inhibitor therapy.
These mutations cause abnormal signaling that promotes uncontrolled cell growth in lung cancer. Tagrisso blocks these signals and helps slow or stop tumor growth. Tagrisso is now commonly used to treat EGFR-mutated lung cancer and is often prescribed as a first-line treatment or after other therapies stop working.
| Product Name | Tagrisso |
|---|---|
| Active Ingredient | Osimertinib |
| Drug Type | Epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI) |
| Available Forms | Oral tablets |
| Strengths Available | 40 mg and 80 mg |
| Routes of Administration | Oral |
| Tagrisso Uses | Treats: Certain types of EGFR-mutated non-small cell lung cancer (NSCLC) in adults. |
| Duration of Treatment | Treatment duration varies depending on the patient’s condition and the doctor’s recommendation. |
| Tagrisso Storage | Store at room temperature (20°C-25°C or 68°F-77°F) |
| Pregnancy and Breastfeeding | Consult a doctor |
| Legal Status | Rx only |
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Tagrisso is FDA-approved to treat certain types of non-small cell lung cancer (NSCLC) in adults who have specific changes in their tumors in the EGFR gene.
Tagrisso (osimertinib) is a targeted therapy used to treat certain types of non-small cell lung cancer (NSCLC) with specific EGFR gene mutations. Normally, the EGFR protein helps regulate cell growth, but mutations such as exon 19 deletions and exon 21 L858R substitutions can keep the receptor constantly active, leading to uncontrolled cancer cell growth.
Osimertinib is a third-generation EGFR tyrosine kinase inhibitor (TKI) that selectively blocks the abnormal EGFR protein and prevents the signals that allow cancer cells to grow and survive. It is also effective against the EGFR T790M resistance mutation, which can develop after treatment with earlier EGFR inhibitors.
In addition, Tagrisso can cross the blood–brain barrier, allowing it to reach cancer cells that have spread to the brain. By blocking abnormal EGFR signaling, Tagrisso may help slow tumor growth and control disease progression.
The dosage and administration guide for Tagrisso:
Tagrisso has both common and serious side effects. Contact your doctor immediately if you experience severe or unusual symptoms.
| Common Side Effects of Tagrisso | Serious Side Effects of Tagrisso |
|---|---|
| Fatigue or weakness | Severe liver injury |
| Diarrhea | QT interval prolongation |
| Skin rash | Gastrointestinal perforation |
| Decreased appetite | Rapid or irregular heartbeat |
| Mouth sores | Severe skin reactions |
| Cough | Interstitial lung disease (ILD) |
| Nail changes | Lightheadedness |
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Before you take Tagrisso tablets, keep the following precautions in mind:
Patients taking Tagrisso tablets should be monitored closely. The medication may cause certain serious adverse reactions. Tagrisso warnings include:
Tagrisso should not be taken by:
If you experience a Tagrisso overdose, call the Poison Control Center at 1-800-222-1222 immediately. Seek emergency medical help if any severe symptoms occur.
If you are taking Tagrisso, follow the regimen as directed. If you miss a dose of Tagrisso, follow a simple set of instructions:
Keep the following Tagrisso storage guidelines in mind to keep the medication in a proper condition:
Certain medications may interact with Tagrisso, particularly strong CYP3A inducers or drugs that prolong the QT interval. Consult your healthcare professional for the complete list of Tagrisso interactions.
Consult your doctor before taking any of the following Tagrisso alternatives if Tagrisso is unavailable.
The choice of therapy depends on:
How long Tagrisso is used depends on the patient’s condition, cancer stage, and treatment response.
Typical treatment durations include:
Some patients may continue treatment for months or even years if the drug continues to control the cancer.
Tagrisso is generally an expensive targeted cancer medication. In the United States, the price of Tagrisso can vary widely, depending on dosage, pharmacy pricing, and insurance coverage. Since treatment for advanced cancer is often long-term, many patients look for ways to lower medication costs. Patients may choose to order Tagrisso online from Canada to explore potential cost savings.
Tagrisso can be costly if you purchase it from local U.S. pharmacies, especially if you don’t have insurance coverage. At Polar Bear Meds, we help you access your prescribed medications at more affordable prices by sourcing them through fully licensed Canadian and international pharmacy partners.
You can buy Tagrisso online in Canada from Polar Bear Meds and enjoy additional benefits such as:
At Polar Bear Meds, your prescription is filled through licensed pharmacy partners to ensure authenticity and safety. If you are looking for a reliable and affordable way to buy Tagrisso online from Canada, Polar Bear Meds offers a convenient option.
The information about Tagrisso is provided for informational and educational purposes only and is not intended to replace professional medical guidance, diagnosis, or treatment. Tagrisso is a prescription-based medicine and should be used only under the supervision of a healthcare professional. Always consult your doctor before changing or stopping your Tagrisso dosage.

Dr. Jackson Miller is a board-certified medicine physician & hospitalist. He is a healthcare professional with a strong background in patient care. With years of experience and a patient-first approach, he believes the foundation of good health is a patient who feels informed and empowered. He contributes to medical content review, drawing on his background in clinical practice and patient education. He focuses on presenting health information in a clear, accurate, and accessible way to help readers make informed decisions. His work emphasizes clarity, evidence-based guidance, and understandable explanations of medical topics.
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