Effect of VU0364770 and LSP1-2111 on haloperidol-induced catalepsy. Both VU0364770 (A, s.c. administration) and LSP1-2111 (B, i.p. administration) dose-dependently reduced catalepsy induced by haloperidol (1.5 mg/kg, i.p.). The maximum effect achieved by both drugs, was comparable to that of the A2A antagonist (56.6 mg/kg; white bar), that was used as a positive comparator drug in this experiment. (n = 10 for VU0364770; n = 10 for LSP1-2111 treated group) p < 0.05, * vs. vehicle, Dunnett's test.