PCP has also been shown to cause schizophrenia-like changes in N -acetylaspartate and N -acetylaspartylglutamate levels in the rat brain, which are detectable both in living rats and upon necropsy examination of brain tissue.  It also induces symptoms in humans that mimic schizophrenia.  PCP not only produced symptoms similar to schizophrenia, it also yielded electroencephalogram changes in the thalamocortical pathway (increased delta decreased alpha) and in the hippocampus (increase theta bursts) that were similar to those in schizophrenia.  PCP induced augmentation of dopamine release may link the NMDA and DA hypothesis of schizophrenia. 
Since the early 1980s, the purchase and use of PCP in the has not been available to the general public. Nowadays most of the PCP used in the is restricted to the treatment of utility poles and railroad ties . In the United States, any drinking water supply with a PCP concentration exceeding the MCL , 1 ppb , must be notified by the water supplier to the public.  Disposal of PCP and PCP contaminated substances are regulated under RCRA as F-listed (F021) or D-listed (D037) hazardous wastes. Bridges and similar structures like piers can still be treated with pentachlorophenol.