Vipadenant is an adenosine receptor antagonist, with Kis of 1.3 nM and 68 nM for A2A and A1, respectively.
Vipadenant (0.3-30 mg/kg) produces a dose-dependent reduction in catalepsy. Vipadenant (10 mg/kg) does not produce any statistically significant dyskinetic episodes in 6-OHDA-lesioned rats during a 19-day dosing regimen[1]. In the mouse and rat haloperidol-induced hypolocomotion models, vipadenant has a minimum effective dose of 0.1 and 1 mg/kg, respectively. Vipadenant (3 and 10 mg/kg, p.o.) is able to increase contralateral rotations in 6-OHDA lesioned rats[2].
References:
[1]. Jones N, et al. A2A receptor antagonists do not induce dyskinesias in drug-naive or L-dopa sensitized rats. Brain Res Bull. 2013 Sep;98:163-9.
[2]. Brian C. Shook, et al. Adenosine A2A Receptor Antagonists and Parkinson’s Disease. ACS Chem Neurosci. 2011 Oct 19; 2(10): 555-567.