Hallucinogenic substances are chemicals that can alter a person's perception, mood, and cognitive processes. These substances can lead to experiences where individuals see, hear, or feel things that are not present in reality. Common examples of hallucinogens include LSD, psilocybin (found in certain mushrooms), and DMT. The effects of hallucinogens can vary widely, ranging from visual distortions to profound changes in thought and emotion. While some people seek these experiences for recreational or spiritual reasons, they can also pose risks, including anxiety, paranoia, and lasting psychological effects. Understanding their impact is essential for safe use.