Please sign up here to get occasional updates from WBUR's ongoing series, "This Moment in Cancer." Even three queasy pregnancies didn't prepare Kate Murphy for the nonstop nausea that often comes with chemotherapy. In the early months of 2016, the Lexington, Mass., mother tried everything the doctors and nurses suggested. "But for the most part I felt nauseous 24/7," she said. Murphy, then 49 and fighting breast cancer, dropped 15 pounds from her already slim frame in just two months.