Study of Huperzine A Sustained-Release Tablets in Patients With Alzheimer's Disease

Study Overview
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Brief Summary
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The main purpose of this study is to evaluate the safety and efficacy of Huperzine A sustained release tablets in patients with mild to moderate Alzheimer's Disease.

Detailed Description
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The primary aim of this multicenter, randomized, double-blind, double-dummy, placebo- and active-controlled therapeutic trial is to determine whether treatment with huperzine A sustained-release tablets can improve cognitive function in individuals with AD. A total of 390 participants will be randomly assigned to three groups of equal size. This will allow a comparison of huperzine A sustained-release tablets 400µg once a day, huperzine A tablets 200µg twice a day, and placebo. The study is divided into 2 periods: A two-week placebo run-in period A 6-month double blind treatment period, consisting of three months of titration and three months of fixed dose treatment.

Official Title
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A Multi-Center, Randomized, Double-Blind, Double-Dummy, Placebo- and Active-Controlled, Study to Evaluate the Safety and Efficacy of Huperzine A Sustained-Release Tablets in Patients With Mild to Moderate Alzheimer's Disease

Conditions
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Alzheimer's Disease

Intervention / Treatment
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* Drug: Huperzine A
* Drug: huperzine A
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male/female patient aged between 50 and 85 Clinical diagnosis of mild to moderate probable AD based on DSM-IV and the NINCDS-ADRDA criteria Middle school or above: 11 ≤MMSE ≤ 24, elementary school: 8 ≤ MMSE ≤ 20, illiteracy: 5 ≤ MMSE ≤ 16; CT or MRI scan excluding another structural brain disease; Hachinski Ischemic Score < 4 Hamilton Depression Scale ≤10 Informed consent of the patient (or legal representative) and of the caregiver agreeing to take part in the study. Exclusion Criteria: Proven or clinically suspected other type of dementia such as vascular dementia, mechanic or chemical caused dementia, vitamin B12 deficiency, hypothyroidism etc. Epileptic Patient Severe liver or renal disease Resting pulse less than 50 Mechanical intestinal obstruction patient History of stroke History of angina or other severe cardiac, vascular, lung, gastrointestinal and hematopoietic system disease Cognitive damage caused by alcohol or substance abuse Disable to participate or cooperate in the protocol Use of any agent for the treatment of dementia within 2 weeks of randomization Use of another investigational agent within 3 months of screening Be sensitive to Huperzine A or other ACHEIs.

Ages Eligible for Study
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Minimum Age: 50 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Huperzine A Sustained-Release Tablet<br> | Drug: Huperzine A<br>* Sustained-Release Tablet, 400µg once a day, 24 weeks<br>|
| Active Comparator: Huperzine A Tablet<br> | Drug: huperzine A<br>* Tablet, 200µg twice a day, 24 weeks<br>|
| Placebo Comparator: Placebo<br> | Drug: Placebo<br>* placebo orally twice a day<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Alzheimer's Disease Assessment Scale - Cognitive Subscale |  | week 24 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Clinician's Interview Based Impression of Change, plus caregiver input |  | week 24 | 
| Activities of Daily Living |  | week 24 | 
| Neuropsychiatric Inventory |  | week 24 |