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Safety and Tolerability of Dimebon in Patients on Memantine, and Memantine Plus Donepezil

This study has been completed.
Information provided by (Responsible Party):
Medivation, Inc. Identifier:
First received: January 12, 2009
Last updated: November 6, 2015
Last verified: November 2015
The purpose of this study is to evaluate the safety and tolerability of dimebon given to Alzheimer's disease patients currently on a stable dose and regimen of memantine or memantine plus donepezil.

Condition Intervention Phase
Alzheimer's Disease Drug: Dimebon Drug: Placebo Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Multi-Center Phase 1 Study of the Safety and Tolerability of Dimebon in Alzheimer's Disease Patients on Memantine (Cohort 1) and Memantine Plus Donepezil (Cohort 2)

Resource links provided by NLM:

Further study details as provided by Medivation, Inc.:

Primary Outcome Measures:
  • To assess the safety and tolerability of orally administered dimebon in patients with Alzheimer's disease (AD) on a stable dose and regimen of memantine, or memantine plus donepezil. [ Time Frame: up to 28 days ]
    Treatment discontinuation due to adverse events, the frequency and severity of adverse events, and clinically significant changes in safety assessments (including physical examination findings, vital signs, laboratory values, and ECGs) in the dimebon group will be compared to those reported in the placebo group.

Secondary Outcome Measures:
  • To assess the steady-state pharmacokinetics (PK) of orally-administered dimebon in patients with AD on a stable dose and regimen of memantine, or memantine plus donepezil. [ Time Frame: up to 28 days ]
    The following key parameters will be used to assess the steady-state PK of dimebon: maximum plasma concentration (Cmax), time to maximum plasma concentration (tmax), Ctrough, area under the curve (AUC), and peak-to-trough ratio.

Enrollment: 46
Study Start Date: December 2008
Study Completion Date: August 2010
Primary Completion Date: April 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Dimebon
20 mg dimebon by mouth 3 times per day
Drug: Dimebon
Placebo Comparator: Placebo
20 mg placebo by mouth 3 times per day
Drug: Placebo


Ages Eligible for Study:   50 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Alzheimer's disease
  • On Memantine
  • Caregiver who is willing to accompany the patient to all clinic visits

Exclusion Criteria:

  • Unstable medical illnesses or significant hepatic or renal disease
  • Other primary psychiatric or neurological disorders
  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: NCT00829816

United States, California
Los Alamitos, California, United States, 90720
National City, California, United States, 91950
United States, Florida
Delray Beach, Florida, United States, 33445
Orlando, Florida, United States, 32806
Sponsors and Collaborators
Medivation, Inc.
  More Information

Responsible Party: Medivation, Inc. Identifier: NCT00829816     History of Changes
Other Study ID Numbers: DIM17
Study First Received: January 12, 2009
Last Updated: November 6, 2015

Keywords provided by Medivation, Inc.:
Alzheimers disease

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
Antiparkinson Agents
Anti-Dyskinesia Agents
Dopamine Agents
Excitatory Amino Acid Antagonists
Excitatory Amino Acid Agents processed this record on September 19, 2017