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Efficacy of Circadin® 2 mg in Patients With Mild to Moderate Alzheimer Disease Treated With AChE Inhibitor

This study has been completed.
Information provided by (Responsible Party):
Neurim Pharmaceuticals Ltd. Identifier:
First received: July 15, 2009
Last updated: July 15, 2013
Last verified: July 2013
The aim of this exploratory randomized, placebo controlled study is to evaluate the efficacy of Circadin® 2mg in patients with mild to moderate Alzheimer Disease (AD) treated with the acetylcholinesterase (AChE) inhibitor. The effects of add-on Circadin® 2mg vs. placebo on the decline in cognitive skills and global functioning, as well as on daytime somnolence and will be assessed.

Condition Intervention Phase
Alzheimer's Disease
Sleep Disorder
Drug: Circadin
Drug: Placebo
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Double-blind, Parallel Group, Randomized, Placebo Controlled Study of the Efficacy of Circadin® 2mg in Patients With Mild to Moderate Alzheimer Disease (AD) Treated With Acetylcholinesterase (AChE) Inhibitor

Resource links provided by NLM:

Further study details as provided by Neurim Pharmaceuticals Ltd.:

Primary Outcome Measures:
  • ADAS-cog [ Time Frame: 24 weeks ]

Secondary Outcome Measures:
  • IADL, PSQI global score [ Time Frame: 24 weeks ]

Enrollment: 73
Study Start Date: September 2009
Study Completion Date: May 2013
Primary Completion Date: February 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Circadin
Drug: Circadin
Prolonged Release melatonin (Circadin) 2mg tablets
Placebo Comparator: Placebo
Drug: Placebo
Matched placebo tablets, with identical features to the Circadin tablets


Ages Eligible for Study:   50 Years to 85 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Written informed consent as dictated by local legal circumstances.
  2. Age range: adult patients between 50-85 years of age.
  3. Gender: men and women. Women of child bearing potential or within two years of the menopause must have a negative urine pregnancy test at the Screening Visit.
  4. A documented history of confirmed Alzheimer's disease
  5. Dementia severity: MMSE score > 15,
  6. Stable AChE inhibitor dose for 2 months prior to Screening visit.
  7. Stable medications for non-excluded concurrent medical conditions for four weeks prior to the screening visit.
  8. Stable doses of B12 and/or Folic acid supplements for at least 3 months prior to enrollment and throughout the study.
  9. Cranial image: no evidence of focal disease to account for dementia (established by CT, PET or MRI). If there is no such available scan (CT, PET or MRI), one must be performed prior to enrollment.
  10. Health: Physically acceptable for the study with no pathology likely to occur during or immediately after the study, as confirmed by medical history and exam and ECG.
  11. Clinical laboratory values must be within normal limits, or judged not clinically significant by the investigator.
  12. Residence: Stable home situation with no planned move during the 28-week investigational period.
  13. A family member or a regular caregiver that will be available for visits and will ensure compliance. The caregiver must speak fluent Hebrew, Russian or English.
  14. Ability to ingest oral medication and participate in all scheduled evaluations.
  15. Ability to spend 2 daily hours outdoors exposed to sunlight.

Exclusion Criteria:

  1. Severe agitation.
  2. Unstable medical condition, mental retardation.
  3. moderate to severe depression as defined by DSM-IV
  4. Use of benzodiazepines or other hypnotics during the study and the preceding four weeks.
  5. Use of Circadin® during the two weeks prior to study enrollment.
  6. Pharmacological immunosuppression.
  7. Participation in a clinical trial with any investigational agent within two months prior to study enrollment.
  8. Alcoholism.
  9. Known or suspected hypersensitivity to exogenous melatonin or melatonin receptor agonists.
  10. Patients with rare hereditary problems of galactose intolerance, the LAPP lactose deficiency or glucose mal absorption.
  11. Renal Failure with creatinine >150 micromol/l.
  12. Hepatic Failure with ASAT; ALAT; GGT levels above three times the upper normal limit.
  13. Clinically significant abnormal laboratory findings which have not been approved by the Safety Officer (sponsor)
  14. Other serious diseases that could interfere with patient assessment.
  15. Caregivers who are unwilling or unable to give informed consent or otherwise fulfill requirements of the study.
  16. Untreated B12 and/or Folic acid deficiency.
  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: NCT00940589

United States, Florida
Meridien Research
Brooksville, Florida, United States, 34601
Meridien Research
St. Petersburg, Florida, United States, 33709
United States, New Jersey
Exodon LLC
Mt. Arlington, New Jersey, United States, 07856
United States, Pennsylvania
Scranton Medical Institute
Scranton, Pennsylvania, United States, 18503
Merchav clinics
Tel-Aviv, Israel
United Kingdom
CPS Research
Glasgow, United Kingdom, G20 0XA
Sponsors and Collaborators
Neurim Pharmaceuticals Ltd.
  More Information

Responsible Party: Neurim Pharmaceuticals Ltd. Identifier: NCT00940589     History of Changes
Other Study ID Numbers: NEU AZ1
Study First Received: July 15, 2009
Last Updated: July 15, 2013

Keywords provided by Neurim Pharmaceuticals Ltd.:
Alzheimer's Disease
Acetylcholinesterase inhibitor
cognitive function
Sleep disturbances

Additional relevant MeSH terms:
Alzheimer Disease
Sleep Wake Disorders
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Neurodegenerative Diseases
Neurocognitive Disorders
Mental Disorders
Neurologic Manifestations
Signs and Symptoms
Molecular Mechanisms of Pharmacological Action
Protective Agents
Physiological Effects of Drugs
Central Nervous System Depressants processed this record on April 25, 2017