Patients with Alzheimer’s disease can experience hallucinations, more commonly visual hallucinations, such as seeing things when there are no objects in the environment, or auditory hallucinations, such as hearing a buzzing sound or the sound of bees. There is a type of dementia called Lewy body dementia, and Lewy body dementia is particularly prone to hallucinations. The hallucinations of Lewy body dementia are called vivid hallucinations, where the patient can see a person and can see the person doing actions, for example, some patients see a person coming in the door, smiling, and holding something in his hand, which is a common hallucination of Lewy body dementia. When hallucinations occur, they need to be treated with atypical antipsychotic drugs if they have an impact on life.