D-Lysergic Acid Diethylamide (LSD) is a semi-synthetic drug derived from lysergic acid, which is found in a fungus that grows on rye and other grains. LSD is one of the most potent hallucinogens.
Short-term, LSD produces delusions and distorted perceptions. The user´s sense of depth and time changes and colours sound and touch seem more intense. Some LSD users experience severe, terrifying thoughts and feelings such as fear of losing control, fear of insanity and death, and despair. The physical effects include dilated pupils, increased heart rate and blood pressure, loss of appetite, sleeplessness, dry mouth and tremors.