An important group of antiemetic drugs used in the treatment of nausea and vomiting after chemotherapy containing an indole moiety in their structures, working as 5- hydroxytryptamine type 3 serotonin receptor antagonist (5-HT3). This study focuses on compounds bearing an indole core that present a 5-HT3 receptor antagonist activity, which have been successfully used as antiemetic drugs for reducing chemotherapy adverse secondary effects during cancer treatment. Their synthesis, biological activities, and some outstanding characteristics are discussed, providing a general outlook towards the development of more efficient antiemetic drugs.
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