YM44778

YM44778 is a NK1-receptor antagonist for treating restless legs syndrome.

YM-44778 is a neurokinin receptor antagonist. The pKi values for NK1, NK2 and NK3 are 8.08, 8.55 and 8.24, respectively. YM-44778 inhibits the increase of bladder pressure induced by substance [Sar9,Met(O2)11] -P (HY-P1012) in anestheticized rats[1].

[1] Choppin A, et al. Effect of YM-44781, YM-44778 and YM-49598, novel tachykinin antagonists, in a drug-induced bladder contraction model. Pharmacology. 2002;65(2):96-102. DOI:10.1159/000056193