Acid is a slang term for lysergic acid diethylamide (LSD). It belongs to a group of substances called psychedelics. Acid can alter a person’s thoughts, feelings, and the way they perceive the world around them.
When a person uses acid, they become disconnected from reality. They may see, hear, and sense things that are not real. They may also have strong emotions. This is known as a “trip.”
Acid is a powerful mind-altering chemical. Its effects can last up to 12 hours, and a person cannot control when the trip ends.
Some people who have used acid report having a “bad trip,” which means that their experience was unpleasant. A bad trip may be terrifying or deeply disturbing.