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Progressive supranuclear palsy (PSP) is a progressive, debilitating neurodegenerative disease of the Parkinson-plus family of syndromes. Unfortunately, there are no pharmacologic treatments for this condition, as most sufferers of the classic variant respond poorly to Parkinson medications such as levodopa. Zolpidem, a gamma aminobutyric acid (GABA) agonist specific to the  α -1 receptor subtype, has been reported to show improvements in symptoms of PSP patients, including motor dysfunction, dysarthria, and ocular disturbances. We observed a 73-year-old woman with a six-year history of PSP, who, upon administration of a single 12.5 mg dose of sustained-release zolpidem, exhibited marked enhancements in speech, facial expressions, and fine motor skills for five hours. These results were reproduced upon subsequent clinic visits. In an effort to find a sustainable medication that maximized these beneficial effects while minimizing side effects and addressing some of her comorbid neuropsychological conditions, a trial of five other GABA receptor agonists was performed with the patient's consent, while she and her caregivers were blinded to the specific medications. She and her caretakers subsequently reported improvements, especially visual, while on eszopiclone, and, to a lesser degree, temazepam and flurazepam.

Trial of Zolpidem, Eszopiclone, and Other GABA Agonists in a Patient with Progressive Supranuclear Palsy