PCP, or phencyclidine, is a dissociative drug that was originally developed as an anesthetic in the 1950s. It is known for its ability to induce feelings of detachment from the body and environment, often leading to altered perceptions and hallucinations. PCP can be found in various forms, including powder, capsules, and liquid, and is sometimes mixed with other substances. The drug acts primarily on the NMDA receptor in the brain, affecting neurotransmitter activity. PCP is classified as a Schedule II controlled substance in the United States due to its potential for abuse and addiction. Its use can lead to serious psychological effects and physical health risks.