This invention relates to benzimidazolone derivatives, represented by compounds of a general formula [I] ##STR00001## [in which R.sup.1 and R.sup.2 stand for, e.g., hydrogen atoms; R.sup.3a, R.sup.3b, R.sup.4, R.sup.5 stand for, e.g., hydrogen atoms and alkyl groups; R.sup.6 stands for e.g., aryl or heteroaryl groups; A ring stands for 5- to 8-membered aliphatic heterocyclic ring containing one nitrogen atom; and Z stands for carbonyl group or sulfonyl group]. The benzimidazolone derivatives of the invention exhibit antagonism to muscarinic acetylcholine receptors, and are useful as treating agent and/or prophylactic of Parkinson's disease, drug-induced parkinsonism, dystonia, akinesia, pancreatitis, bilestone/cholecystitis, biliary dyskinesia, achalasia, pain, itch, cholinergic urticaria, irritable bowel syndrome, vomiting, nausea, dizziness, Meniere's disease, motion sickness and urinary disturbance.

urticaria/nauzea

Benzimidazolone derivatives

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