Lysergic acid blotters diethylamide, also known colloquially as acid, is a hallucinogenic drug. Effects typically include altered thoughts, feelings, and awareness of one’s surroundings. Many users see or hear things that do not exist. Dilated pupils, increased blood pressure, and increased body temperature are typical.

 Lysergic acid diethylamide (LSD)

LSD is sold under more than 80 street names including Acid, Blotter, acid, Doses, Dots, Trips, Mellow Yellow, Window Pane, as well as names that reflect the designs on sheets of blotter paper (for example, “purple dragon”).