<prompt> Rivastigmine and donepezil are drugs used predominantly in the management of:DepressionDissociationDelusionDementia  <response>: Acetylcholinesterase inhibitors donepezil, galantamine, rivastigmine increase the concentration of and duration of action of acetylcholine in the central nervous system. There is evidence that in moderately severe Alzheimers disease, these drugs improve cognitive function and behavior for up to a year. 