Mesdopetam (IRL790) hemitartrate is a dopamine D3 receptor antagonist ( K i =90 nM; IC 50 =9.8 μM for human recombinant D3 receptor) with psychomotor stabilizing properties. Mesdopetam hemitartrate is used for the research of motor and psychiatric complications in Parkinson disease. In Vivo Mesdopetam (IRL790) (3.7, 11, 33, or 100 µmol/kg; s.c.) hemitartrate dose-dependently inhibits the behavioral activation following pretreatment with D-amphetamine or MK-80 . MCE has not independently confirmed the accuracy of these methods. They are for reference only. Animal Model: Male Sprague-Dawley rats Dosage: 3.7, 11, 33, or 100 µmol/kg (synthesized in-house as HCl salt, was dissolved in physiologic saline (0.9% w/v NaCl) Administration: s.c. was administered subcutaneously 4 min before the start of recording Result: Dose-dependently inhibited the behavioral activation following pretreatment with D-amphetamine or MK-801. Form:Solid