Sultopride hydrochloride (LIN-1418 hydrochloride) is a selective antagonist of dopamine D2 receptor. IC50 & Target: Dopamine D2 receptor^[1] In Vivo: Sultopride hydrochloride (LIN-1418 hydrochloride) is a selective antagonist of dopamine D2 receptor. DOPAC and HVA levels in the striatum, the nucleus accumbens and the medial prefrontal cortex are higher in the rats treated with Sultopride hydrochloride and sulpiride than those of the controls. In the striatum, DOPAC and HVA levels are higher in the Sultopride hydrochloride-treated rats than the sulpiride-treated rats (p<0.05). In the nucleus accumbens, DOPAC levels are higher in the Sultopride hydrochloride-treated rats than sulpiride treated rats (p<0.05). In the Sultopride hydrochloride-treated rats, DOPAC and HVA levels are higher in the striatum or in the nucleus accumbens than in the medial prefrontal cortex (p<0.05)^[1].