PCP/Phencyclidine
PCP is a synthetic drug sold as tablets, capsules, or white or colored powder. It can be snorted, smoked, or eaten. Developed in the 1950s as an IV anesthetic, PCP was never approved for human use because of problems during clinical studies, including intensely negative psychological effects.
PCP is a “dissociative” drug, distorting perceptions of sight and sound and producing feelings of detachment. Users can experience several unpleasant psychological effects, with symptoms mimicking schizophrenia (delusions, hallucinations, disordered thinking, extreme anxiety)
http://www.drugabuse.gov/DrugPages/PCP.html
http://thewatershed.us/wp-content/uploads/2009/02/pcp_cigarette__i2003e0657_disp.jpg
http://www-admn.csun.edu/police/crime/images/pcp-pills01.jpg