In 1965, only two years after its introduction to the pharmaceutical market as an analgesic and anesthetic, phencyclidine (PCP) was withdrawn from medical use. Why was this the case?
a. PCP was not an effective analgesic.
b. PCP was not an effective anesthetic.
c. PCP produced emergence delirium in patients recovering from its effects.
d. The use of PCP led to a number of accidental overdose deaths in patients undergoing surgery.
e. None of the above are true. PCP was never marketed as a pharmaceutical.
Answer: C
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