A Safety Study of TTP4000 in Subjects With Alzheimer's Disease

Inclusion Criteria: * Males or females ≥ 50 years of age. * Body Mass Index (BMI) of 18 to 35 kg/m2, inclusive. * Weight ≥ 50 kg. * Alzheimer's disease according to the DSM-IV-TR criteria and a score between 20 and 26 on the Mini Mental State Exam. * Subject must have a medical history for at least 6 months prior to Screening (confirmed by medical records) of a diagnosis of mild Alzheimer's disease. Exclusion Criteria: * Current evidence or history within the last 3 years of a neurological or psychiatric illness that could contribute to dementia, including, but not limited to: epilepsy, focal brain lesion, Parkinson's disease, seizure disorder, or head injury with loss of consciousness; DSM-IV-TR criteria for any major psychiatric disorder, including psychosis, major depression, and bipolar disorder. * Participation and dosing in another clinical trial, involving any marketed or investigational drug, within 30 days before Screening Visit.