NCIt definition : The hydrochloride salt form of tropisetron, a selective, competitive serotonin 5-hydroxytryptamine
type 3 (5-HT3) receptor antagonist, with antinauseant and antiemetic activities. Tropisetron
competitively binds to and blocks the action of serotonin at 5HT3 receptors peripherally
on vagus nerve terminals located in the gastrointestinal (GI) tract as well as centrally
in the chemoreceptor trigger zone (CTZ) of the area postrema of the central nervous
system (CNS). This results in the suppression of chemotherapy- and radiotherapy-induced
nausea and vomiting.;