(5-HT3) receptor antagonist

Definition of 5-HT3 receptor antagonist
National Cancer Institute

5-HT3 receptor antagonist

(… reh-SEP-ter an-TA-guh-nist)
A type of drug used to treat certain types of irritable bowel syndrome and relieve nausea and vomiting. It is a type of antiemetic. Also called 5-hydroxytryptamine 3 receptor antagonist and type 3 serotonin receptor antagonist.

Source: NCI Dictionary of Cancer Terms