I understand that it was used in the US, among some, but I have never known it to have a culture here in the UK, for whatever reason?
It is the one drug that seems not to have migrated into the Island.
So, what is it..?
Let's have a wee look -
Phencyclidine (a complex clip of the chemical name phenylcyclohexylpiperidine, commonly initialised as PCP), also known as angel dust, is a dissociative drug formerly used as an anesthetic agent, exhibiting hallucinogenic and neurotoxic effects. It was first patented in 1952 by the Parke-Davis pharmaceutical company and marketed under the brand name Sernyl. PCP is listed as a Schedule II drug in the United States under the Convention on Psychotropic Substances.
In chemical structure, PCP is an arylcyclohexylamine derivative, and, in pharmacology, it is a member of the family of dissociative anesthetics. PCP works primarily as an NMDA receptor antagonist, which blocks the activity of the NMDA receptor. Other NMDA receptor antagonists include ketamine, tiletamine, and dextromethorphan. Although the primary psychoactive effects of the drug last only hours, total elimination from the body is prolonged, typically extending over at least 8 days.
Effects
Behavioural effects can vary by dosage. Small doses produce a numbness in the extremities and intoxication, characterized by staggering, unsteady gait, slurred speech, bloodshot eyes, and loss of balance. Moderate doses (5-10 mg intranasal, or 0.01-0.02 mg/kg intramuscular or intravenous), will produce analgesia and anesthesia. High doses may lead to convulsions.
Psychological effects include severe changes in body image, loss of ego boundaries, and depersonalization. Visual hallucinations and euphoria are reported infrequently.
The drug has been known to alter mood states in an unpredictable fashion, causing some individuals to become detached, and others to become animated. Intoxicated individuals may act in an unpredictable fashion, driven by their delusions and hallucinations. Included in the portfolio of behavioral disturbances are acts of self-injury including suicide, and attacks on others or destruction of property. The analgesic properties of the drug can cause users to feel less pain, and persist in violent or injurious acts as a result. Recreational doses of the drug can also induce a psychotic state that resembles schizophrenic episodes which can last for months at a time with toxic doses. However, users generally report an "out-of-body" experience where they feel detached from reality, or one's consciousness seems somewhat disconnected from normal reality. Symptoms can be easily recalled by the mnemonic device "RED DANES": rage, erythema (redness of skin), dilated pupils, delusions, amnesia, nystagmus (oscillation of the eyeball when moving laterally), excitation, and skin dryness.