Thiethylperazine is in the class of the piperazine - phenothiazines which are a class of first generation antipsychotic medications. Phenothiazines are generally dopamine receptor antagonists. Thiethylperazine' s antipsychotic effect is due to antagonism at dopamine and serotonin type 2 receptors, with greater activity at serotonin 5-HT2 receptors than at dopamine type-2 receptors. This may explain the lack of extrapyramidal effects. Thiethylperazine does not appear to block dopamine within the tubero-infundibular tract, explaining the lower incidence of hyperprolactinemia than with typical antipsychotic agents or risperidone. It is a sedating antihistamine used as an antiemetic agent for the control of nausea and vomiting associated with surgical procedures.

Thiethylperazine Dopamine Antagonist Pathway References