NCIt definition : A piperazine phenothiazine derivative and a dopamine antagonist used as antiemetic.
Thiethylperazine blocks postsynaptic dopamine 2 (D2) receptors in the medullary chemoreceptor
trigger zone (CTZ), thereby decreasing stimulation of the vomiting center in the brain.
Peripherally, thiethylperazine blocks the vagus nerve in the gastrointestinal tract.
In addition, this agent also shows antagonistic activities mediated through muscarinic
receptors, H1-receptors, and alpha(1)-receptors.;
Alternative definition : NCI-GLOSS: A drug used to prevent or reduce nausea and vomiting. It belongs to the
families of drugs called antiemetics and phenothiazines.;