Procyclidine is an antagonist of muscarinic acetylcholine receptors (Kis = 4.47, 42.66, 7.24, 6.03, and 4.79 nM for M1-5 receptors, respectively).1 It increases fine motor activity counts (ED50 = 1.74 mg/kg) without affecting ambulatory activity in rats in a home-cage activity test.2 Formulations containing procyclidine have been used in the treatment of parkinsonism and extrapyramidal dysfunction.
1.Lazareno, S., Buckley, N.J., and Roberts, F.F.Characterization of muscarinic M4 binding sites in rabbit lung, chicken heart, and NG108-15 cellMol. Pharmacol.38(6)805-815(1990) 2.Sipos, M.L., Burchnell, V., and Galbicka, G.Dose-response curves and time-course effects of selected anticholinergics on locomotor activity in ratsPsychopharmacology147(3)250-256(1999)
















