Commonly known as PCP, phencyclidine was originally developed for use as an anesthetic. Although used in veterinary medicine as a tranquilizer, the use of the drug in humans was discontinued due to negative side effects. PCP is manufactured illegally and sold on the streets under the names “angel dust”, “ozone” and “crystal cyclone”. Common physical effects of the drug include hallucinations, disorientation, muscular incoordination and delusions. The PCP detection window in urine is up to 5 days for infrequent use and up to 20 days for chronic use.