Misuse of a drug in suicides and attempted suicides, as well as injuries resulting from unsupervised use are regarded as indicative of a drug's potential for abuse. There must be an assessment of the extent to which a drug is physically addictive or psychologically habit forming, if such information is known. The bill allows inclusions of immediate precursors on this basis alone . . . and thus safeguards against possibilities of clandestine manufacture. Drugs with serious physical dependence liabilities such as heroin, cocaine, amphetamines, nicotine, and alcohol all affect the production of an important chemical in the brain named dopamine which provides a sense of pleasure and reward. Marijuana does not affect dopamine production, which also explains why animals will not self-administer marijuana.
Adolescents are especially at risk to drug abuse.