Various factors influence how quickly a person’s body processes phencyclidine (PCP). Generally, the drug’s half-life is 21 hours. Different tests can detect PCP, and it may be detectable for ...

PCP may be snorted, smoked, injected or swallowed. It's most commonly sold as a powder or liquid, and applied to a leafy material such as oregano, parsley, mint or marijuana and then smoked.