The effects of acid can last up to 12 hours. Acid, also known as LSD, is a potent drug that alters the way the user perceives the world. In the United States, it is a Schedule I drug, making it illegal to purchase, possess, manufacture or sell.
The effects of acid can vary from user to user. Someone who takes acid may experience dilated pupils, raised blood pressure and increased body temperature. He may also experience blurry vision, a tingling in the body and a feeling of drowsiness. Acid generally causes colors to become heightened, and the user feels a sense of extreme bliss. Acid users sometimes report having religious or spiritual experiences while under the influence. They often take impulsive actions and demonstrate poor judgment during trips.