• Steven M Grunberg, David Warr, Richard J Gralla, Bernardo L Rapoport, Paul J Hesketh, Karin Jordan, and Birgitte T Espersen.
• Division of Hematology/Oncology, University of Vermont College of Medicine, 89 Beaumont Avenue, Given Building E214, Burlington, VT 05405, USA. Steven.Grunberg@uvm.edu
• Support Care Cancer. 2011 Mar 1; 19 Suppl 1: S43-7.

AbstractAntiemetic drug development can follow the same logical path as antineoplastic drug development from appropriate preclinical models through Phase I, Phase II, and Phase III testing. However, due to the marked success of antiemetic therapy over the last 25 years, placebo antiemetic treatment against highly or moderately emetogenic chemotherapy is not acceptable. Promising antiemetic agents therefore rapidly reach Phase III testing, where they are substituted into or added to effective and accepted regimens. One challenge of antiemetic drug development is determining whether substitution is indeed acceptable or whether prior regimens must be maintained intact as a basis for further antiemetic drug development. An additional challenge is the classification of emetogenic level of new antineoplastic agents. Accurate reporting of emetogenicity of such antineoplastic agents in the absence of preventive antiemetic treatment may not be available. However, at the 2009 Multinational Association of Supportive Care in Cancer (MASCC)/European Society of Medical Oncology (ESMO) Consensus Conference, an expert panel used best available data to establish rankings of emetogenicity. Oral chemotherapeutic agents are ranked separately from intravenous agents, recognizing intrinsic differences in emetogenicity as well as differing schedules of administration. Since oral chemotherapeutic agents are often administered in extended regimens, the distinction between acute and delayed emesis is less clear, and cumulative emesis must be considered. As control of vomiting has improved, attention has shifted to control of nausea, a related but distinct and equally important problem. Additional efforts will be necessary to understand mechanisms of nausea and to identify optimal remedies.

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