Phencyclidine
PCP can be eaten, snorted, injected (shot into the body using a needle), or smoked. A person can take a low, medium, or high dose of PCP, and he will have different effects depending on which dose he takes. Low doses can cause a person to feel euphoric (very happy), relaxed, numb, detached from his own body, anxious, or confused. At low doses, people can also have sensory distortions (changes in how they hear, see, taste, smell, or feel things); amnesia (where the person cannot remember things normally); speech which does not make sense; blurred vision; or a blank stare. Medium doses can cause confusion, agitation, analgesia (not feeling pain), fever, excessive salivation, and "schizophrenic-type" behavior. High doses can cause seizures, respiratory failure (where the breathing systems in the body stop working), coma, fever, stroke, or death.