Later, phencyclidine was used as an animal tranquilizer. Again, its use was discontinued altogether by legitimate manufacturers. It is relatively cheap to make PCP, making it an attractive drug for dealers. PCP is available in tablet, capsule or powder form. PCP can be smoked, swallowed, snorted or injected.
Most users prefer to apply the powder form to marijuana or tobacco for smoking.
Tolerance occurs with continued use. The effects of PCP on the user are varied. The bad trip may include vivid distortions of the environment, extreme paranoia, muscle rigidity, a feeling of numbness, tremors and blackout periods. The PCP user may become extremely violent and be of great danger to those around him. The user also runs the risk of long-term psychosis.