The many different illegal drugs in the world can all have harmful effects on the human body, but that doesn't stop many people from using them. Some people will do everything they can to get hold of these dangerous drugs. Among the numerous illegal drugs, there is a certain type of drugs called hallucinogens. Hallucinogens are a class of drugs that cause hallucinations, profound distortions in a person's perception of reality. The most common hallucinogen is called lysergic acid, more commonly called “LSD” or simply “acid”. LSD was discovered by accident. “Albert Hofmann, a chemist working for Sandoz Pharmaceutical, first synthesized LSD in 1938, in Basel, Switzerland, while searching for a blood stimulant,” (Unknown). While Hofmann was searching for a blood stimulant, he accidentally synthesized LSD. It is the most potent drug, which means that taking a very small dose will have a noticeable effect on the user. "It was later discovered that an oral dose of just 25 micrograms (equal in weight to a few grains of salt) is capable of producing vivid hallucinations." This shows that LSD is very powerful and a small dosage can have a big effect on the user. LSD is commonly taken by placing a square tab of paper towel containing droplets of the drug on or under the tongue. There are a variety of harmful effects that can occur when people use this drug. As a result of using the drug LSD (lysergic acid), the most commonly used hallucinogen, psychological problems, emotional problems and brain problems occur among those who use the drug. For one thing, when someone decides to take the drug LSD, many different psychological problems can occur. Hallucinations occur once this drug is used. “Hallucinations may occur… middle of paper… Works Cited Anderson, Marc. “The Psychological Effects of LSD.” The Crypts of Erowid. Network. July 28, 1992. February 6, 2014. “The Truth About LSD.” Foundation for a Drug-Free World. Network. February 14, 2014.Evans, Benjamin. “Effects of LSD on the Brain.” The blueprint of the human brain. November 5, 2013. Web. February 18, 2014. Tod, Tanya. “Effects of LSD on Body and Mind.” Stable health. nd Web. 18 February 2014. “Hallucinogens.” Psychology today. February 9, 2006. Web. February 19, 2014. “LSD.” Health education. Network. February 25, 2014. "Hallucinogens". Short and long term effects. Network. February 25, 2014. “Does LSD cause brain damage?” LSD addiction. Network. February 25, 2014. “Harmful Side Effects of LSD.” The spiritual river to recovery. Network. March 2, 2014. “LSD Use and Long-Term Effects.” LSD addiction. Network. March 02, 2014. "LSD: A Brief History." The truth about LSD. Network. April 28. 2014.