Tucatinib is a cancer fighter, mainly used for HER2-positive breast cancer patients who have cancer cells in their brain. It works by stopping a protein called HER2 that helps cancer cells grow and live. Tucatinib is available in two doses: a 50 mg and a 150 mg tablet.
You’re supposed to take 300 mg of it two times a day, and it’s best to eat something while you take it to help it work well. You’re supposed to swallow the tablets whole, not break them up. You’ll find this medicine in bottles that hold 60 pills.
To keep diarrhea at bay, which is a possible side effect, some people might need to change their starting dose depending on how they feel during the first few days of taking the drug. Tucatinib works by blocking something called HER2 signaling in your body, which helps stop the cancer from growing and spreading if you have HER2-positive breast cancer with brain metastases.
