Hallucinations and memory impairment have a parallel clinical course in Parkinson's disease (PD) and are independently associated dysfunction and pathology accumulation in hippocampal subregions. Similar alterations of hippocampal function are found in schizophrenic patients with memory impairment and positive psychotic symptoms. These findings suggest that dysfunction of the hippocampus may be a shared mechanism for memory impairment and psychosis across diseases. This investigation aims to address these questions and assess the efficacy of AGB101 for the treatment of psychosis in PD.
This clinical trial will test whether AGB101 (low-dose levetiracetam, 220 mg, extended release tablet) can improve symptoms of psychosis in Parkinson's disease. Participants will be asked to complete up to 5 in-person study visits over approximately 20 weeks. Participants will receive both AGB101 and a placebo to take once a day for 6 weeks, with a 4-week washout in between. Participation will also involve physical/neurological exams, questionnaires, paper and pencil tests, providing blood and urine samples, and completing two MRI exams.