LSD (lysergic acid diethylamide) is a long-acting psychoactive drug that alters and distorts perceptions and feelings. LSD is one of the most powerful mood-altering drugs available in uncontrolled situations. It causes long-lasting distortions in a person’s perception of reality. Although LSD’s popularity peaked in the 1960s and 1970s, the drug has been there since 1938, when it was first synthesized. Ergot, a fungus that keeps growing on grains like rye, was used to create it. LSD is a Schedule I drug in many countries, making it illegal. This indicates that the drug has a strong risk of abuse. LSD is a hallucinogenic substance; therefore, it can alter one’s consciousness, emotions, and thoughts.