section is split into two main areas, the actual addictions and
then the effects of drugs on the body.
The DSM-IV defines drug addiction: "When an individual persists
in use of alcohol or other drugs despite problems related to use
of the substance, substance dependence may be diagnosed. Compulsive
and repetitive use may result in tolerance to the effect of the
drug and withdrawal symptoms when use is reduced or stopped. This,
along with Substance Abuse are considered Substance Use Disorders...."