helped shrink tumors in some patients with bile duct cancers—specifically a subset of people whose tumors make a high amount of the HER2 protein, which can cause cells to multiply too quickly., was a global, multicenter effort to evaluate the effectiveness and safety of zanidatamab, an antibody that works against the HER2 protein, in patients with HER2-amplifed bile duct cancer that has not responded to other treatment.
The most common side effects of the treatment were diarrhea and infusion-related reactions, such as allergic reactions, pain at the injection site, nausea, or flu-like symptoms . A small number of people had a decrease in heart function. No severe side effects were reported.