<unk> (injection) is a 5-HT3 receptor antagonist that is FDA approved for the prevention of nausea and vomiting associated with initial and repeat courses of emetogenic cancer chemotherapy.   Common adverse reactions include diarrhea, headache, and fever.
Ondansetron 
Palonosetron
Niperotidine
Alosetron
Pantethine
Lerisetron
Ramosetron
Palonosetron hydrochloride