AD is a neurodegenerative disorder characterized by the loss of memorydifficulty in learning and retaining new information depressive symptoms aggression agitation and disorders of perception. Firstly it is characterized by the psychiatrist and neuropathologist Dr. Alois Alzheimer. In this book we explain the pathophysiology and treatment of Alzheimer disease by the approved drug and a herbal drug but both types of drugs gives only symptomatic relief.