Beginning of Essay
April, 1956 : The pharmaceutical company Parke & Davis first synthesize what they believe to be the perfect anesthetic (Souza, 1995). When administered to patients, it causes a completely dissociative state, with no significant respiratory or cardiovascular depres ....

Middle of Essay
.... as PCP, is a polycyclic compound belonging to the arylcyclohexylamine class of chemicals [figure 1.0] (Souza 1993). In pure form, it is a white powder which readily dissolves in water. The cyclohexamines are known for their the potent neurological effects, with PCP being the most potent. Almost every variation has been administered to, or abused by, humans at some time (Nintey Fifth Congress, 1978). All these compounds have similar pharmacological effects, which vary considerably according to the amount administered. Small doses produce a `drunken' state, in which subjects report a numbness in the extremities, while some species (like dogs and cats ....