Istradefylline, or KW6002, was developed by Kyowa Hakko Kirin in Japan for the treatment of Parkinson's disease as an adjunct to standard therapy. Unlike standard dopaminergic therapies for Parkinson's, Istradefylline targets adenosine A2A receptors in the basal ganglia. This region of the brain is highly involved in motor control. Istradefylline is indicated as an adjunct treatment to [levodopa] and [carbidopa] for Parkinson's disease. This drug was first approved in Japan on 25 March 2013. Istradefylline was granted FDA approval on 27 August 2019.

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