Hallucinogens are substances that have been known to change ones perception of reality. Users often report seeing things, hearing things and feeling sensations that do not exist(White House, 2008).

Types (Sutter, 2008)
The Hallucinogen Psilocybin.
The Hallucinogen Psilocybin.

1) LSD - Mood changing chemical found on fungus.
2) Peyote - Small spineless cactus with main ingedient mescaline.
3) PCB - Initially used as an anethestic, but has serious long term effects.
4) Psilocybin - Obtained from certain types of Mushrooms.

According to the 2006 National Survey on Drug Use and Health (NSDUH), there were 1.1 million persons aged 12 or older in 2006 who reported they had used hallucinogens for the first time within the past 12 months(Kosten, 2007).

Due to the random mind alternating effects, Hallucinogens become very dangerous due to the unpredictibility of the drugs(Cunningham, 2007)





References
1) White House Policy. Office Of National Control Drug Policy. http://www.whitehousedrugpolicy.gov/drugfact/hallucinogens/index.html
2) Sutter Health Affiliate. Palo Alto Medical Foundation. http://www.pamf.org/teen/risk/drugs/hallucinogens/
3) Kosten, T. NIDA/Hallucinogens. http://www.nida.nih.gov/Infofacts/hallucinogens.html
4) Cunningham, N. NIDA/Hallucinogens. http://www.nida.nih.gov/Infofacts/hallucinogens.html