Ondansetron

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** A carbazole derivative with antiemetic activity. As a selective serotonin receptor antagonist, ondansetron competitively blocks the action of serotonin at 5HT3 receptors, resulting in suppression of chemotherapy- and radiotherapy-induced nausea and vomiting. (NCI04)

**Synonyms:** - ONDANSETRON - Zofran ODT - Zuplenz - ondansetron - ondansetron