Rivastigmine hydrogen tartrate, i.e. (−)S-N-ethyl-3-[(1-dimethyl-amino)ethyl]-N-methylphenyl- carbamate hydrogen tartrate, is a carbamate inhibitor of acetylcholinesterase (AChE) used in the treatment of mild to moderate Alzheimer’s disease in adults. The gene discussed is ACHE; the disease is Alzheimer disease.