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Origin and history of P.C.P.
P.C.P.
also PCP, drug with mind-altering effects, also known as angel dust, 1960s, from the full chemical name, phencyclidine, which was introduced in the 1950s as an anesthetic, limited to animal use in the 1960s, and emerged as a problem drug in the 1970s.
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Trends of P.C.P.
adapted from books.google.com/ngrams/ with a 7-year moving average; ngrams are probably unreliable.
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