ChEBI: Fabesetron is an organic heterotricyclic compound that is 8,9-dihydropyrido[1,2-a]indol-6(7H)-one substituted by a (5-methyl-1H-imidazol-4-yl)methyl group at position 7R and a methyl group at position 10. It is a dual 5-HT3 and 5-HT4 receptors antagonist whose clinical development was terminated in phase II. It was being developed for the treatment of chemotherapy-induced emesis and irritable bowel syndrome. It has a role as an antiemetic and a serotonergic antagonist. It is a member of imidazoles and an organic heterotricyclic compound.