“…Elevated Ach levels have been observed in the striatal region of the brain in animal models ( Bymaster et al, 1986 , Damsma et al, 1990 , Schulze-Delrieu, 1981 ). As a result, anticholinergic (AC) medications have been employed to correct the DA-Ach imbalance and have had some success in treating various types of drug-induced movement disorders, including akathisia and dystonia ( Greene et al, 1988 , Qiu and Lim, 2011 , Wei et al, 2012 , Waln and Jankovic, 2013 ). However, in the case of drug-induced CTD, symptoms may persist or even exacerbate after AC medication co-administration ( Brotchie et al, 2011 , Rana et al, 2013 ).…”