SR 142948 dihydrochloride is a selective, orally active, non-peptide neurotensin receptor (NT) antagonist, featuring IC50 values of 1.19 nM, 0.32 nM, and 3.96 nM in h-NTR1-CHO cells, HT-29 cells, and adult rat brain, respectively. It effectively inhibits NT-induced inositol monophosphate formation in HT-29 cells (IC50 = 3.9 nM) and blocks NT-induced hypothermia, analgesia, and steering behavior in vivo. Furthermore, it demonstrates blood-brain barrier permeability, positioning it as a potential tool for psychiatric disorder research [1] [2].