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Home » Directories » FDA Approved Drugs » Tukysa (tucatinib)

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Tukysa (tucatinib)

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Contact Information

Contact: Seagen
Website: www.tukysa.com

Currently Enrolling Trials

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    General Information

    Tukysa (tucatinib) is a kinase inhibitor .

    Tukysa is specifically indicated for use in combination with trastuzumab and capecitabine for treatment of adult patients with advanced unresectable or metastatic HER2-positive breast cancer, including patients with brain metastases, who have received one or more prior antiHER2-based regimens in the metastatic setting.

    Tukysa is supplied as a tablet for oral administration. The recommended dosage of Tukysa is 300 mg taken orally twice daily in combination with trastuzumab and capecitabine until disease progression or unacceptable toxicity. Advise patients to swallow Tukysa tablets whole and not to chew, crush, or split prior to swallowing. Advise patients not to ingest tablet if it is broken, cracked, or not otherwise intact. Advise patients to take Tukysa approximately 12 hours apart and at the same time each day with or without a meal. If the patient vomits or misses a dose of Tukysa, instruct the patient to take the next dose at its usual scheduled time. When given in combination with Tukysa, the recommended dosage of capecitabine is 1000 mg/m2 orally twice daily taken within 30 minutes after a meal. Tukysa and capecitabine can be taken at the same time. Refer to the Full Prescribing Information for trastuzumab and capecitabine for additional information.

    Mechanism of Action

    Tukysa (tucatinib) is a tyrosine kinase inhibitor of HER2. In vitro, tucatinib inhibits phosphorylation of HER2 and HER3, resulting in inhibition of downstream MAPK and AKT signaling and cell proliferation, and showed anti-tumor activity in HER2 expressing tumor cells. In vivo, tucatinib inhibited the growth of HER2 expressing tumors. The combination of tucatinib and trastuzumab showed increased anti-tumor activity in vitro and in vivo compared to either drug alone.

    Side Effects

    Adverse effects associated with the use of Tukysa may include, but are not limited to, the following:

    • diarrhea
    • palmar-plantar erythrodysesthesia
    • nausea
    • fatigue
    • hepatotoxicity
    • vomiting
    • stomatitis
    • decreased appetite
    • abdominal pain
    • headache
    • anemia
    • rash

    Clinical Trial Results

    The FDA approval of Tukysa was based on the results of HER2CLIMB, a randomized (2:1), double-blind, placebo-controlled trial enrolling 612 patients who had HER2-positive advanced unresectable or metastatic breast cancer and had prior treatment with trastuzumab, pertuzumab and ado-trastuzumab emtansine (T-DM1). Patients with previously treated and stable brain metastases, as well as those with previously treated and growing or untreated brain metastases, were eligible for the clinical trial, and 48% of enrolled patients had brain metastases at the start of the trial. The primary endpoint was progression-free survival (PFS). The median PFS in patients who received Tukysa, trastuzumab, and capecitabine was 7.8 months compared to 5.6 months in those patients who received placebo, trastuzumab, and capecitabine. Overall survival and PFS in patients with brain metastases at baseline were key secondary endpoints. The median overall survival in patients who received Tukysa, trastuzumab, and capecitabine was 21.9 months compared to 17.4 months in patients who received placebo, trastuzumab, and capecitabine. The median PFS in patients with brain metastases at baseline who received Tukysa, trastuzumab and capecitabine was 7.6 months compared to 5.4 months in patients who received placebo, trastuzumab and capecitabine.

    Approval Date: 2020-04-01
    Company Name: Seagen
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