Safety and Efficacy Study of Ladostigil in Mild to Moderate Probable Alzheimer's Disease

This is a phase II, proof of concept study to evaluate the safety and efficacy of the investigational compound ladostigil versus placebo in mild to moderate Alzheimer's disease patients. The randomized, double-blind, placebo-controlled phase of the trial will be 26 weeks in duration and will involve two cohorts (i.e. one arm receiving ladostigil and one arm receiving placebo). After the initial 26 week period, all participating subjects will receive 26 weeks of treatment with ladostigil (i.e. the open label phase). A total of five territories will be participating in this trial. These include Austria, Croatia, Germany, Serbia and Spain.

Inclusion criteria

• AD diagnosis according to NINCDS-ADRDA criteria
• Mild to moderate AD according to MMSE 14-24 inclusive
• MRI or CT assessment within 6 months before baseline, corroborating the clinical diagnosis and excluding other potential causes of dementia especially cerebrovascular lesions
• Absence of major depressive disease according to CSDD of less than or equal to 18
• Modified Hachinski Ischemic Scale equal to or below 4
• Education for eight or more years
• Previous decline in cognition for more than six months as documented in patient medical records
• A caregiver available and living in the same household or interacting with the patient daily and available if necessary to assure administration of investigational product
• Patients living at home or nursing home setting without continuous nursing care
• General health status acceptable for participation in a 12-month clinical trial and ability to swallow oral medication
• No history of treatment with rivastigmine
• For patients with either donepezil or galantamine anti-cholinesterase inhibitor treatment prescribed, stopped treatment four weeks prior to screening
• For patients with memantine treatment prescribed, stopped treatment four weeks prior to screening

Exclusion criteria

• Other primary degenerative dementias (e.g. dementia with Lewy bodies, fronto-temporal dementia, Huntington's disease, Jacob-Creutzfeldt disease)
• Other neurodegenerative conditions (Parkinson's disease. amyotrophic lateral sclerosis, etc)
• Other central nervous system diseases (severe head trauma, tumors, subdural hematoma, etc)
• A current DSM-IV diagnosis of active major depression, schizophrenia or bipolar disorder
• Seizure disorders
• Other infectious, metabolic or systemic diseases affecting central nervous system (syphilis, present hypothyroidism, present vitamin B12 or folate deficiency, serum electrolytes out of normal range, juvenile onset diabetes mellitus, etc)
• Clinically significant, advanced or unstable disease that may interfere with primary or secondary variable evaluations
• Other unstable, chronic or clinically significant medical conditions involving major organs like kidney, liver, lungs and heart/vasculature
• Hospitalization or change of chronic concomitant medications one month prior to screening or during screening period