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January 23, 2023January 19, 2023 - Seagen Inc. announced that the U.S. Food and Drug Administration (FDA) has granted accelerated approval to Tukysa (tucatinib) in combination with trastuzumab for adult patients with RAS wild-type, HER2-positive unresectable or metastatic colorectal cancer that has progressed following treatment with fluoropyrimidine-, oxaliplatin- and irinotecan-based chemotherapy.
TUKYSA was approved by the U.S. FDA in April 2020 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 anti-HER2-based regimens in the metastatic setting. This is the first FDA-approved treatment in HER2-positive metastatic colorectal cancer. The FDA previously granted Breakthrough Therapy Designation and Priority Review for Tukysa in this setting.
The Prescribing Information for Tukysa includes warnings and precautions for diarrhea, hepatotoxicity and embryo-fetal toxicity, some of which may be severe or fatal. The most common adverse reactions (≥20%) in patients treated with Tukysa and trastuzumab were diarrhea, fatigue, rash, nausea, abdominal pain, infusion-related reactions, and pyrexia.