Psychoactive plants are natural species that contain compounds capable of altering an individual's mental state. These plants can affect mood, perception, and consciousness, often leading to experiences such as euphoria, hallucinations, or relaxation. Common examples include cannabis, psilocybin mushrooms, and peyote. Many cultures have used psychoactive plants for centuries in rituals, medicine, and recreation. The active compounds in these plants interact with the brain's neurotransmitters, influencing how we think and feel. Research continues to explore their potential therapeutic benefits, particularly in treating conditions like depression and anxiety.