- In 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine-Treated Primates, the Selective 5-Hydroxytryptamine 1a Agonist (R)-(+)-8-OHDPAT Inhibits Levodopa-Induced Dyskinesia but Only with\ Increased Motor Disability. Iravani, M.M., Tayarani-Binazir, K., Chu, W.B., Jackson, M.J., Jenner, P. J. Pharmacol. Exp. Ther. (2006)