Emedastine

Emedastine is a potent, high affinity histamine H1-receptor-selective antagonist with Ki of 1.3 ±0.1 nM for H1-receptors while considerably weaker at H2- (K1 = 49,067 ± 11,113 nM) and H3-receptors (Ki = 12,430 ± 1,282 nM) .