title: Permanent dementia in idiopathic Parkinsonism treated with levodopa.
mesh_terms: D000368:Aged; D000547:Amantadine / Q000627:therapeutic use; D001921:Brain / Q000473:pathology; D004295:Dihydroxyphenylalanine / Q000009:adverse effects* / Q000627:therapeutic use; D004569:Electroencephalography; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000188:drug therapy* / Q000473:pathology; D011605:Psychoses, Substance-Induced; D011736:Pyridoxine / Q000627:therapeutic use; D014282:Trihexyphenidyl / Q000627:therapeutic use
chemical_list: D004295:Dihydroxyphenylalanine; D014282:Trihexyphenidyl; D000547:Amantadine; D011736:Pyridoxine