Pharmacology C.N.S e1110c5c Drug of choice in drug induced parkinsonism is: A Levodopa B Benzhexol C Amantidine D Carbidopa High-Yield Explanation Ans. (B) Benzhexol(Ref: KDT 8/e p460)Central anticholinergics like trihexy phenydyl (Benzhexol) are the only drugs effective in drug induced Parkinsonism.