When a person says they are “tripping,” it means they are experiencing the effects of hallucinogens. Hallucinogens are psychoactive (mind-altering) drugs that significantly alter our senses and perceptions. Some common ones are magic mushrooms, LSD and ecstasy. Cannabis can also cause hallucinogenic effects at high doses.
Hallucinogens are substances that change the way you sense or perceive things around you. Some hallucinogens, such as peyote, magic mushrooms and salvia, are found in nature. Others, such as LSD (acid), angel dust and ketamine, are man-made.