When does a terminal patient start hallucinating?

Terminal patients may begin to experience hallucinations as their condition progresses, often due to a combination of factors such as metabolic changes, dehydration, pain, medications, or the effects of illness on the brain. These hallucinations can occur in the days to weeks leading up to death, although the timing can vary widely among individuals. Emotional and psychological factors may also play a role in the onset of these experiences. It's important for caregivers to provide supportive care during this time.