The Effects of Memantine Added to Cholinesterase Inhibitors on NPI Behavioral Domains: Pooled Post Hoc Analysis of 3 Randomized Controlled Trials in Patients With Moderate to Severe AD (S9.008)

Objective: To assess the effect of memantine (MEM) and a cholinesterase inhibitor (ChEI) vs ChEI alone on four syndrome domains of the Neuropsychiatric Inventory (NPI). Background: Neuropsychiatric symptoms negatively impact daily function and quality of life, hasten time to institutionalization, and increase overall healthcare costs. MEM significantly improved multiple domain scores of the NPI in patients with Alzheimer’s disease (AD) compared with placebo (PBO). Design/Methods: Data were pooled for participants with moderate to severe AD (baseline MMSE Results: Of 1262 patients, 637 were treated with MEM/ChEIs and 625 with PBO/ChEIs (age [mean±SD]: 75.7±8.3 years; baseline MMSE: 11.5±3.5; baseline NPI total score: 14.9±14.6). For all syndrome domains, mean treatment differences favored MEM/ChEIs over PBO/ChEIs. For psychosis symptoms, MEM/ChEI-treated patients improved significantly compared with PBO/ChEI-treated patients at 12 (LSMD −1.167, P Conclusions: In patients with moderate to severe AD taking ChEIs, treatment with the combination of memantine and a ChEI was associated with significant benefit for psychosis and neurovegetative behavioral syndromes compared with ChEI alone. Disclosure: Dr. Cummings has received personal compensation for consulting, serving on a scientific advisory board, speaking, or other activities with Acadia, Accera, Actinogen, Alkahest, Allergan, Alzheon, Avanir, Axsome, BiOasis Technologies, Biogen, Bracket, Denali, Diadem, EIP Pharma, Eisai, Forum, Genentech, Green Valley, Grifols, Hisun, Idorsia, Kyowa Kirin, Lilly, Lundbeck, MedAvante, Merck, Otsuka, Pain Therapeutics, Proclara, QR, Resverlogix, Roche, Samus, Sunovion, Suven, Takeda, Teva, Toyama, and United Neuroscience. Dr. Cummings has received compensation for serving on the Board of Directors of ADAMAS, Prana, Sonexa, MedAvante, Neurotrax, and Neurokos.. Dr. Cummings has received royalty, license fees, or contractual rights payments from Neuropsychiatric Inventory. Dr. Grossberg has received personal compensation for consulting, serving on a scientific advisory board, speaking, or other activities with Acadia, Alkahest, Allergan, Inc., Avanir Pharmaceuticals, Axovant, GE, Genetech, Inc., Lundbeck Research USA, Inc., Novartis, Otsuka, Roche Diagnostics Corporation, Takeda Pharmaceutical Company, EryDel, Merck \u0026 Co., Inc., and Newron. Dr. Grossberg has received research support from Cognoptix, Genentech, Inc., Janssen Pharmaceutica, Roche Diagnostics Corporation, and NIH. Dr. Porsteinsson has received personal compensation for consulting, serving on a scientific advisory board, speaking, or other activities with Alzheon, Acadia, Neurim, and the New York State Psychiatric Institute.. Dr. Porsteinsson has received research support from AstraZeneca, Avanir, Biogen, Eisai, Eli Lilly, Genentech/Roche, Janssen Alzheimer Initiative, Merck, Novartis, the National Institutes of Health (NIH), the National Institute of Mental Health (NIMH), The National Institute on Aging (NIA), and the Department of Defense.. Dr. Hendrix has received personal compensation for consulting, serving on a scientific advisory board, speaking, or other activities with Pentara Corporation, a consulting company that received funding from Allergan plc and consults for several other pharmaceutical companies.. Dr. Ellison has received personal compensation for consulting, serving on a scientific advisory board, speaking, or other activities with Pentara Corporation. Dr. Kerolous has received personal compensation for consulting, serving on a scientific advisory board, speaking, or other activities with Allergan.