A common chemotherapy regimen gets reclassified as high risk for emesis; a new approach is recommended to tackle treatments with high emetic potential; and a particular antiemetic drug is now preferred for patients at moderate risk - these are among the changes to clinical practice guidelines from the American Society of Clinical Oncology.The guidelines also include new recommendations for preventing nausea and vomiting associated with radiation treatment.Treatment-related nausea and vomiting is...