Allopregnanolone Regenerative Therapeutic for Mild Alzheimer's Disease

Main Inclusion Criteria: * Men and postmenopausal women * Age 55 to 80 years old * Meets NIA-AA criteria for probable AD dementia * MMSE of 20-26 * Plasma p-Tau217 positive * Geriatric Depression Scale short form (GDS-S) score of ≤ 6 * No medical contraindications to participation * Capacity to provide informed consent at screening Main Exclusion Criteria: * Dementia other than probable AD * Use of benzodiazepines, anticonvulsants, antipsychotics, or other drugs that might interact with the GABA-A receptor complex * History of stroke with a modified Hachinski Ischemic Scale score \>4 * History of seizure disorder, focal brain lesion, traumatic brain injury * History within the last 5 years of a primary or recurrent malignant disease * Unstable or clinically significant cardiovascular, kidney or liver disease * MRI indicative of any other significant abnormality, including but not limited to one or more significant ARIA-E or macro-hemorrhage findings, or multiple microhemorrhages (\>8), or Fazekas score of 3; encephalomalacia, aneurysms, vascular malformations, subdural hematoma, or space occupying lesions * Any conditions that would contraindicate MRI studies. * No evidence of AD-like pattern of brain atrophy