Orvepitant maleate

Orvepitant (Compound 3a; 0.3-10 mg/kg; Oral administration; marmoset) treatment shows a dose dependant reduction of the number of postures was observed at 1 mg/kg (34.9% reduction), 3 mg/kg (36.6% reduction) and 10 mg/kg (46.4% reduction), suggesting a potential anxiolytic-like effect of the compound^[1].
Orvepitant (compound 3a) shows an oral bioavailability (F) of 17% in rat and 55% in dog, plasma clearance (Clp) of 29 mL/min/kg in rat and 6 mL/min/kg in dog and a half-life of 2.3 h in rat and 6.1 h in dog. As far as the brain penetration in rats is concerned, a B/P ratio of 1.2 is observed 5 min after the i.v. administration of a 1 mg/kg dose of Orvepitant^[1].