PCP, or phencyclidine, is a dissociative drug originally developed in the 1950s as an intravenous anesthetic. It was discontinued for human use in 1965 due to severe side effects such as agitation, delusions, and irrational behavior. Currently, PCP is illegal and is known as a dangerous recreational drug. PCP commonly appears as a white or colored crystalline powder or liquid. It has a distinctive bitter chemical taste and is often smoked by being applied to leafy substances like tobacco or marijuana. It can also be ingested in pill, tablet, or capsule form, snorted, or injected. As a mind-altering drug, PCP acts primarily as an NMDA receptor antagonist, causing hallucinations and distorted perceptions of reality, including sights and sounds. Users may experience a feeling of being "out of body" or detached from their environment, with altered sense of time and perception. At low to moderate doses, PCP can cause numbness, poor coordination, and effects similar to alcohol intoxication. At high doses, it may induce hallucinations, paranoia, delusions, violent behavior, seizures, coma, and even death. Long- term users may suffer from speech difficulties, depression, memory loss, and motor skill impairment. PCP can also cause flashbacks, where effects reoccur even after stopping use. Street names for PCP include angel dust, hog, ozone, rocket fuel, embalm fluid, and supergrass among others.