What diseases is tucatinib suitable for treating and how to take it?

Tucatinib is a cancer drug used to treat breast cancer that is locally advanced or metastatic (has spread to other parts of the body), and breast cancer that is HER2-positive, meaning that cancer cells produce a protein called HER on their surface. 2. To stimulate cancer growth, it can also be used in combination with two other drugs (capecitabine and trastuzumab), such as in combination with trastuzumab to treat adult patients with RAS wild-type HER2-positive unresectable or metastatic colorectal cancer after at least 2 other HER2-positive cancer treatments have been tried. The recommended dose of tucatinib is 300 mg taken orally twice daily.