Nausea and vomiting induced by chemotherapy. Nausea and vomiting induced by chemotherapy impact heavily anticancer treatment safety. It is necessary to define correctly, assess frequently and treat perfectly, following national or international guidelines. New treatment are currently developed in the field of emesis protection. Old drugs may help patients. Physicians as well as nurses and caregivers have to be involved in emesis protection. It is one of the key topic in cancer care management.