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A Randomized, Placebo-Controlled Trial to Examine the Efficacy of Oral Donepezil in Subjects With MCI

This study has been completed.
Information provided by:
Pfizer Identifier:
First received: June 5, 2007
Last updated: February 1, 2008
Last verified: February 2008
To purpose of this study is to estimate the effect of donepezil on Neuropsychological Testing (NPT) and brain Proton Magnetic Resonance Spectroscopy.

Condition Intervention
Alzheimer's Disease
Drug: donezepil (Aricept)

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double-Blind
Primary Purpose: Treatment
Official Title: A Randomized Double-Blind, Parallel, Placebo-Controlled Trial to Examine the Efficacy of Oral Donepezil (5 mg QD for 6 Weeks) After Single Dose and Steady State Therapy (2 Weeks and 6 Weeks) in Subjects With Mild Cognitive Impairment

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Neuropsychologic test scores: GMLT, DSST, Cog State TM including PAL test, RAVLT, ADAS-cog at baseline (pre-dose) 5 and 8 hours after the first dose and 2 and 6 weeks. (Continues in next bullet.)
  • MRS (Magnetic Resonance Spectroscopy) profile including but not limited to NAA (N-acetyl-aspartate), NAA/Cr (N-acetyl-aspartate/creatinine ratio), MI (Myoinositol) and MI/Cr (Myoinositol/creatinine ratio).

Estimated Enrollment: 38
Study Start Date: June 2004
Study Completion Date: January 2007

Ages Eligible for Study:   55 Years to 90 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy males or females ages 55-90 inclusive (Healthy is defined as no clinically relevant abnormalities identified by a detailed medical history, full physical examination, including blood pressure and heart rate measurement, 12-lead ECG and clinical laboratory tests)
  • Body Mass Index (BMI) between 18 to 34 kg/m2, inclusive; and a total body weight
  • Subjects with mild cognitive impairment (MCI) must have a reliable informant who has an average of 10 hours per week or more contact with the subject.
  • Memory complaints and memory difficulties, which are verified by an informant
  • Mini-mental status exam (MMSE) score of 24-30

Exclusion Criteria:

  • Subjects with known hypersensitivity to donepezil hydrochloride or to piperidine derivatives
  • Insulin-requiring diabetes or uncontrolled diabetes mellitus
  • Subjects with a current diagnosis of depression or other psychiatric illnesses
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00483028

United States, Connecticut
Pfizer Investigational Site
New Haven, Connecticut, United States
United States, New York
Pfizer Investigational Site
Albany, New York, United States
Sponsors and Collaborators
Study Director: Pfizer Call Center Pfizer
  More Information

Additional Information: Identifier: NCT00483028     History of Changes
Other Study ID Numbers: A9001134
Study First Received: June 5, 2007
Last Updated: February 1, 2008

Additional relevant MeSH terms:
Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders
Cholinesterase Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Cholinergic Agents
Neurotransmitter Agents
Physiological Effects of Drugs
Nootropic Agents processed this record on April 28, 2017