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A 48-Week, Multicenter, Open-Label, Observational Study Evaluating Oral Rivastigmine in Patients with Mild-to-Moderate Alzheimer's Disease in Taiwan

Chiung-Chih Chang, Giia-Sheun Peng, Te-Jen Lai, Chien-Hsun Li, Ching-Kuan Liu
Advances in Therapy 2019 April 5

INTRODUCTION: Rivastigmine is a cholinesterase inhibitor, approved for the treatment of mild-to-moderate dementia of Alzheimer's type. This study assessed the short- and long-term effectiveness and safety of rivastigmine in patients with mild-to-moderate Alzheimer's disease (AD) in a real-world clinical setting in Taiwan.

METHODS: This was a 48-week, single-arm, open-label, prospective, observational, post-marketing surveillance, multicenter study. The primary outcomes were change from baseline to week 48 in the Mini-Mental State Examination (MMSE) and Clinical Dementia Rating (CDR) scores. One-year persistence to treatment, effect on activities of daily living, and incidence of adverse events (AEs) were also assessed.

RESULTS: Overall, 151 patients were enrolled in the study, of which 91 (60.26%) completed this study. At the end of the study, the mean rivastigmine dose received by the patients was 6.59 mg/day. At week 48, the changes in mean [standard deviation (SD)] MMSE and CDR scores in the intent-to-treat (ITT) population from baseline were - 1.00 (3.8; p = 0.0344) and 0.07 (0.29; p = 0.0403), respectively. The most frequently reported AEs by preferred term were dizziness (12.58%) and nausea (9.27%). No new or unexpected AEs were observed, and 30 (20.13%) patients in the ITT population were on rivastigmine therapy for 1 year without treatment discontinuation.

CONCLUSION: Despite the low 1-year persistence rate, rivastigmine showed a stabilizing effect on declining cognition in patients with mild-to-moderate AD in a real-world scenario. Rivastigmine is well tolerated at 6.0-9.0 mg/day with no unexpected safety concerns.

FUNDING: Novartis Co. Ltd., Taipei, Taiwan.


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