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Trial record 10 of 21 for:    Dimebon Alzheimer's

An Extension To The B1451027 Protocol To Evaluate The Long Term Safety And Tolerability Of Dimebon In Patients With Alzheimer's Disease

This study has been terminated.
(See termination reason in detailed description.)
Medivation, Inc.
Information provided by (Responsible Party):
Pfizer Identifier:
First received: July 13, 2009
Last updated: October 11, 2012
Last verified: October 2012

The purpose of this study is to evaluate the long-term safety and tolerability of Dimebon in patients with Alzheimer's disease.

Condition Intervention Phase
Alzheimer's Disease
Drug: Dimebon
Phase 3

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Endpoint Classification: Safety Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: An Open Label Extension To The B1451027 Protocol To Evaluate The Long Term Safety And Tolerability Of Dimebon (PF 01913539) In Patients With Alzheimer's Disease

Resource links provided by NLM:

Further study details as provided by Pfizer:

Primary Outcome Measures:
  • Percentage of Participants With Adverse Events (AEs) [ Time Frame: Baseline up to Week 65 (end of treatment) ] [ Designated as safety issue: Yes ]
    An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship.

Secondary Outcome Measures:
  • Percentage of Participants With Abnormal Clinically Significant Vital Signs [ Time Frame: Baseline up to Week 65 (end of treatment) ] [ Designated as safety issue: Yes ]
    Abnormal clinically significant vital signs included absolute systolic blood pressure (BP) values less than (<) 90 millimeter of mercury (mmHg), maximum increase or decrease of greater than or equal to (>=) 30 mmHg from baseline for systolic BP; absolute diastolic BP <50 mmHg with maximum increase or decrease of >=20 mmHg from baseline and absolute heart rate values <40 beats per minute (bpm), >120 bpm for supine or sitting measurement, >140 bpm for standing measurement.

  • Percentage of Participants With Abnormal Clinically Significant Laboratory Values [ Time Frame: Baseline up to Week 65 (end of treatment) ] [ Designated as safety issue: Yes ]
    For hematology, liver function, renal function, electrolytes, clinical chemistry, abnormality was reported if observed value was more than or less than X times upper limit of normal (ULN) or lower limit of normal (LLN); X=specified in categories of each parameter in measured values section. For urinalysis abnormality was reported if result was >=1 in qualitative test of all parameters except red and white blood cells which were reported if result was >=6, indicating levels in urine were abnormal. Urine pH abnormality reported if >8 and urine specific gravity abnormality if <1.003 or >1.030.

  • Percentage of Participants With Clinically Significant Electrocardiogram (ECG) Findings [ Time Frame: Baseline up to Week 65 (end of treatment) ] [ Designated as safety issue: Yes ]
    Abnormal ECG findings included maximum value of >=300 millisecond (msec), maximum increase of >=25% for baseline value of >200 msec and maximum increase of >=50% for baseline value of <=200 msec for PR interval (int); maximum increase of >=25% for baseline value of >100 msec and maximum increase of >=50% for baseline value of <=100 msec for QRS interval; maximum value of >450 to <=480, >480 to <=500 and >500 msec, increase of >30 to <=60 and >60 msec for QT interval corrected using Fridericia's formula (QTcF).

Enrollment: 649
Study Start Date: September 2009
Study Completion Date: August 2010
Primary Completion Date: August 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Dimebon 20 mg TID
10 mg TID for Week 1, followed by 20 mg TID for remainder of study
Drug: Dimebon
Tablet for oral administration
Other Name: PF-01913539

Detailed Description:

This study was terminated on May 7, 2010 as part of modification of the dimebon development plan following lack of demonstration of efficacy in the completed DIM14 (CONNECTION) Study. The study was not terminated due to any safety findings. Dimebon has been well -tolerated in clinical trials. Demonstration of efficacy for dimebon in Alzheimer's disease is pending completion of the ongoing DIM18 (CONCERT) Study.


Ages Eligible for Study:   50 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Completion of previous Phase 3 Dimebon study (B1451027).

Exclusion Criteria:

  • Have any severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or investigational product administration or may interfere with the interpretation of study results and, in the judgment of the investigator, would make the patient inappropriate for entry into this study.
  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: NCT00939783

  Show 106 Study Locations
Sponsors and Collaborators
Medivation, Inc.
Study Director: Pfizer Call Center Pfizer
  More Information

Additional Information:
No publications provided

Responsible Party: Pfizer Identifier: NCT00939783     History of Changes
Other Study ID Numbers: B1451029
Study First Received: July 13, 2009
Results First Received: October 11, 2012
Last Updated: October 11, 2012
Health Authority: United States: Food and Drug Administration

Additional relevant MeSH terms:
Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Delirium, Dementia, Amnestic, Cognitive Disorders
Mental Disorders
Nervous System Diseases
Neurodegenerative Diseases
Tauopathies processed this record on November 20, 2014