[Chemotherapy of malignant tumors, vomiting and nausea--what to do?].

Very marked nausea and vomiting are the most frequently observed side effects of modern cytostatic agents, and make it necessary to include powerful anti-emetic drugs in any oncological chemotherapeutic concept. The selection of suitable anti-emetics, however, often proves difficult. The reasons for this are discussed. A number of important basic rules that should be observed with any anti-emetic treatment are proposed. Finally, a standardised stepwise anti-emetic plan is suggested for discussion.