Description
(R)-(-)-alpha-Methylhistamine dihydrobromide is a potent and high affinity histamine H3 agonist (KD = 50.3 nM) displaying > 200-fold selectivity over H4 receptors. It inhibits H3-mediated histamine synthesis and release in the CNS at nanomolar concentrations, and induces H4-mediated eosinophil shape change (EC50 = 66 nM)