Pramipexole dihydrochloride hydrate, a non-ergot dopamine agonist, is the hydrochloride salt form of the benzothiazole derivative pramipexole. It selectively activates D2 and D3 dopamine receptors in brain regions like the striatum. This compound is widely used in in vitro and in vivo research for studying Parkinson's disease, restless legs syndrome, and dopaminergic signaling pathways.