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Serotonin 5-HT3 receptor antagonist
REVIEW Ondansetron is a selective serotonin 5-HT3 receptor antagonist. The antiemetic activity of the drug is brought about through the inhibition of 5-HT3 receptors present both centrally (medullary chemoreceptor zone) and peripherally (GI tract). This inhibition of 5-HT3 receptors in turn inhibits the visceral afferent stimulation of the vomiting center, likely indirectly at the level of the area postrema, as well as through direct inhibition of serotonin activity within the area postrema and the chemoreceptor trigger zone.
Ramsook C, Sahagun-Carreon I, Kozinetz CA, Moro-Sutherland D: A randomized clinical trial comparing oral ondansetron with placebo in children with vomiting from acute gastroenteritis. Ann Emerg Med. 2002 Apr;39(4):397-403.
Yilmaz HL, Yildizdas RD, Sertdemir Y: Clinical trial: oral ondansetron for reducing vomiting secondary to acute gastroenteritis in children-a double-blind randomized study. Aliment Pharmacol Ther. 2010 Jan;31(1):82-91. Epub .
Gregory RE, Ettinger DS: 5-HT3 receptor antagonists for the prevention of chemotherapy-induced nausea and vomiting. A comparison of their pharmacology and clinical efficacy. Drugs. 1998 Feb;55(2):173-89.
Gan TJ: Selective serotonin 5-HT3 receptor antagonists for postoperative nausea and vomiting: are they all the same? CNS Drugs. 2005;19(3):225-38.
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