Classes of psychoactive drugs that can cause subjective changes in perception, thought, emotion and consciousness. They are often (atleast in my experience) feared by most usually due to being uneducated about them. They typically have low to no detrimental side effects and are used for a variety of purposes like religion, meditation, self exploration and improvement, fun, and I'm sure many others. Many of these "Drugs" are naturally occurring and have been used for many, many years by many cultures such as the Egyptians, Mayans, and a variety of cultures. If you're thinking about doing them, not that this is an endorsement as they are certainly not for everyone, you should probably be familiar with it's effects, proper dose, and be prepared for the possibility of the infamous "Bad Trip". They should be taken in a safe, comforting environment while under the supervision of a "Sober Buddy" if possible. On a side note, not a bad idea to keep condoms on you and stay away from knives. Wish someone would have told me that... what a great time <3
Examples of Hallucinogenic drugs are DMT, LSD, Many of the 2C family drugs, Shrooms, ect.