A comparison of the effect of combining WC 10 and WC 44 in the total AIMs score is shown relative to the administration of each compound alone. Each drug was administered at a dose of 3 mg/kg i.p. L-dopa/benserazide was then immediately administered at a dose of 8 mg/kg, each. The normalized AIM scores ± S.E.M. were a) WC 10, 92.6 ± 8.2 (n = 10; p = 0.6), b) WC 44, 68.8 ± 10.1 (n = 10; p = 0.02) and c) WC 10 plus WC 44, 31.4 ± 7.0 (n = 9; p ≤ 0.0001).