Rivastigmine -d 3 hydrochloride is deuterated labeled Rivastigmine. Rivastigmine (ENA 713 free base) is an orally active and potent cholinesterase (ChE) inhibitor and inhibits butyrylcholinesterase ( BChE ) and acetylcholinesteras ( AChE ) with IC 50 s of 0.037 μM , 4.15 μM, respectively. Rivastigmine can pass the blood brain barrier (BBB). Rivastigmine is a parasympathomimetic or cholinergic agent used for the research of mild to moderate dementia of the Alzheimer's type and dementia due to Parkinson's disease.