A Real-world Analysis of Treatment Patterns for Cholinesterase Inhibitors and Memantine among Newly-diagnosed Alzheimer's Disease Patients.

In the USA Medicare population, about 50% of the patients who initiated treatment with AChEI or memantine after diagnosis continued the index treatment, and more than 20% discontinued and were untreated afterwards over the observation period. AD patients initiating AChEIs or memantine were more likely to remain on their treatment if they were persistently treated for the first year.