A Study to Evaluate Efficacy and Safety of BAC in Patient With Alzheimer's Disease or Vascular Dementia

Exclusion Criteria

• •1. With large vessel thrombosis (thrombotic stroke occurring in large arteries)
• •2. With radiological evidence of other brain disorders (subdural hematoma, post-traumatic / post-surgery)
• •3. With dementia caused by other brain diseases except Alzheimer's disease and vascular dementia (e.g. Parkinson's disease, demyelinated disease of the central nervous system, tumor, hydrocephalus, head injury, central nervous system infection including syphilis, acquired immune deficiency syndrome, etc.)
• •4. With clinical evidence of pulmonary, hepatic, gastrointestinal, metabolic, endocrine or other life threatening diseases judged by investigators not suitable to enter the study
• •5. With clinically unstable hypertension, diabetes mellitus, and cardiac disease for the last 3 months
• •6. Ever hospitalized for stroke or with acute coronary syndrome in the previous 3 months prior to screening
• •7. Drug or alcohol abuse within the previous 12 months of screening.
• •8. With one of the following abnormal laboratory parameters: hemoglobin \< 10 mg/dL or platelet \< 100\*109/L; creatinine or total bilirubin more than 1.5 times the upper limit value; alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphates (ALP), γ-glutamyl transferase (γ-GT) more than 2 times the upper limit of normal, or thyroid-stimulating hormone (TSH) more than 2.5 times the upper limit value or less than the lower limit value of normal
• •9. With severe depression graded by Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) and Cornell Scale for Depression in Dementia (CSDD)
• •10. With any uncontrolled illness (including, but not limited to, any of the following: ongoing or active infection including hepatitis B, C, and HIV, active bleeding, symptomatic congestive heart failure, uncontrolled hypertension, unstable angina pectoris or, cardiac arrhythmia) judged by the investigator that entering the trial may be detrimental to the patient
• •11. With known or suspected hypersensitivity to any ingredients of study product and vehicle
• •12. Pregnant or lactating or premenopausal with childbearing potential but not taking reliable contraceptive method(s) during the study period
• •Note: Reliable contraceptive methods will consider as below:
• •1. Established use of oral, injected or implanted hormonal methods of contraception \> 3 months prior to baseline.
• •2. Placement of an intrauterine device (IUD) or intrauterine system (IUS) \> 3 months prior to baseline.
• •3. Barrier methods of contraception: Condom or Occlusive cap (diaphragm or cervical/vault caps) with spermicidal foam/gel/film/cream/suppository
• •4. Partner male sterilization (i.e., vasectomy) \> 1 month of screening
• •13. Enrollment in any investigational drug trial within 4 weeks of screening visit
• •14. Experienced dosage increment of routinely use in drugs listed as follows within past three months before Screening visit
• •1. medications/treatments for Alzheimer's disease or vascular dementia
• •2. antipsychotic medications including but not limited to selective serotonin reuptake inhibitors (SSRIs), benzodiazepine (BZD)
• •3. Vitamin B12
• •4. drugs for thyroid disease
• •15. Current antiplatelet drug (antiaggregant) except dosage including but not limited to aspirin \<= 100mg/day, clopidogrel \<= 75mg/day, ticagrelor \<= 180mg/day, dipyridamole \<= 400mg/day
• •16. Caregivers who have psychotic symptoms, are imminently suicidal, have an unstable medical condition (e.g. recent heart attack, recent stroke, episodes of dizziness, fainting attacks) or significant orthopaedic problems.