We're building a better ClinicalTrials.gov. Check it out and tell us what you think!
ClinicalTrials.gov Menu

Safety Study of TRx0237 in Patients Already Taking Medications for Mild and Moderate Alzheimer's Disease

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT01626391
Recruitment Status : Terminated (This study has been terminated for administrative reasons only.)
First Posted : June 22, 2012
Results First Posted : July 11, 2014
Last Update Posted : July 11, 2014
Information provided by (Responsible Party):
TauRx Therapeutics Ltd

Brief Summary:
The primary purpose of this study is to assess the safety and tolerability of TRx0237 when taken at the same time as acetylcholinesterase inhibitors (i.e., donepezil, galantamine, or rivastigmine) and / or memantine to treat patients with mild to moderate Alzheimer's Disease.

Condition or disease Intervention/treatment Phase
Alzheimer's Disease Drug: TRx0237 Drug: Placebo Phase 2

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 9 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Double-Blind, Placebo-Controlled, Randomised, 4-Week Safety and Tolerability Study of TRx0237 in Subjects With Mild to Moderate Alzheimer's Disease on Pre-Existing Stable Acetylcholinesterase Inhibitor and/or Memantine Therapy
Study Start Date : September 2012
Actual Primary Completion Date : March 2013
Actual Study Completion Date : March 2013

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: TRx0237 Drug: TRx0237
TRx0237 tablets 250 mg/day (given as 125 mg bid) for 4 weeks

Placebo Comparator: Placebo Drug: Placebo
Placebo tablets will be administered twice daily (b.i.d.) for 4 weeks. The placebo tablets include 4 mg of TRx0237 as a urinary and faecal colourant to maintain blinding; hence, the placebo group will receive a total of 8 mg/day of TRx0237.

Primary Outcome Measures :
  1. Safety and Tolerability of TRx0237 When Coadministered With an Acetylcholinesterase Inhibitor (AChEI) and/or Memantine [ Time Frame: 8 weeks ]
    This was assessed by the number of participants who experienced adverse events within each treatment group (TRx0237 versus placebo) during 8 weeks of treatment.

Information from the National Library of Medicine

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, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   up to 90 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria

  • Clinical diagnosis of all cause dementia and probable Alzheimer's disease (AD)
  • Mini-Mental State Examination (MMSE) score of 14-26 (inclusive)
  • Cognitive impairment present for at least 6 months
  • Age ≤90 years
  • Modified Hachinski ischaemic score of ≤4
  • Females, if of childbearing potential, must use adequate contraception and maintain this use throughout participation in the study
  • Patient is able to read, understand, and provide written informed consent
  • Has one or more identified caregivers who are able to verify daily compliance with study drug and provide information on safety and tolerability; the caregiver(s) must also give consent to participate
  • Currently taking an taking an acetylcholinesterase inhibitor and/or memantine; the subject must have been taking such medication(s) for ≥3 months. The dosage regimen must have remained stable for ≥6 weeks and it must be planned to remain stable throughout participation in the study.
  • Able to comply with the study procedures

Exclusion Criteria:

  • Significant central nervous system disorder other than Alzheimer's disease
  • Patients in whom baseline MRI is contraindicated such as metal implants in head (except dental), pacemaker, and cochlear implant
  • Significant focal or intracranial pathology that would lead to a diagnosis other than probable Alzheimer's disease
  • Clinical evidence or history of stroke, transient ischemic attack, significant head injury or other unexplained or recurrent loss of consciousness
  • Epilepsy
  • Major depressive disorder, schizophrenia or other psychotic disorders, bipolar disorder, substance (including alcohol) related disorders
  • Resides in a hospital or continuous care facility
  • History of swallowing difficulties
  • Pregnant or breastfeeding
  • History of significant hematological abnormality or current acute or chronic clinically significant abnormality
  • Abnormal serum chemistry laboratory value at Screening deemed to be clinically relevant by the investigator
  • Clinically significant cardiovascular disease or abnormal assessments
  • Pre-existing or current signs or symptoms of respiratory failure
  • Concurrent acute or chronic clinically significant immunologic, renal, hepatic, or endocrine disease (not adequately treated) and/or other unstable or major disease other than Alzheimer's disease
  • Prior intolerance to methylthioninium-containing drug or any of the excipients
  • Treatment currently or within 3 months before Baseline with any of the following medications (unless otherwise noted):

    • Tacrine
    • Anxiolytics and/or sedatives/hypnotics (exceptions: sedation for MRI or occasional short-acting benzodiazepines, chloral hydrate, or zolpidem as needed at bedtime)
    • Antipsychotics (clozapine, chlorpromazine, thioridazine, or ziprasidone)
    • Carbamazepine
    • Drugs associated with methaemoglobinaemia (e.g., dapsone, local anesthetics such as benzocaine used chronically, primaquine and related antimalarials, sulfonamides)
    • Warfarin (and other Coumadin derivates such as phenprocoumon)
  • Current or prior participation in a clinical trial of a drug, biologic, or device in which the last dose was received within 28 days prior to Baseline

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01626391

Layout table for location information
Achim, Germany
Berlin, Germany
Leipzig, Germany
München, Germany
United Kingdom
Birmingham, United Kingdom
Bradford, United Kingdom
Crowborough, United Kingdom
Duston, United Kingdom
Oxford, United Kingdom
Sheffield, United Kingdom
St Leonards on Sea, United Kingdom
Staffordshire, United Kingdom
Sponsors and Collaborators
TauRx Therapeutics Ltd
Layout table for investigator information
Principal Investigator: Mark Dale, MD MAC Clinical Research
Layout table for additonal information
Responsible Party: TauRx Therapeutics Ltd
ClinicalTrials.gov Identifier: NCT01626391    
Other Study ID Numbers: TRx-237-008
First Posted: June 22, 2012    Key Record Dates
Results First Posted: July 11, 2014
Last Update Posted: July 11, 2014
Last Verified: June 2014
Keywords provided by TauRx Therapeutics Ltd:
Alzheimer's Disease
Safety Study
Additional relevant MeSH terms:
Layout table for MeSH terms
Alzheimer Disease
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders