chemicals only make brain cells polluted with particles from inorganic materials.
those materials later time may feel you sick.
See: disclaimer.
On a side note, the drugs are carbon chains in general and I think fall within the classification of organic materials. The inorganic materials found in junkies brains are from the impurities or the junk as it's referred to.
So please, only use USP grade PCP as per scribed by your doctor.