Drugs abuse or substance abuse is the use of particular chemicals with the purpose of
developing pleasurable effects on the brain (Langwith 5). These substances are consumed with
methods or amounts that are harmful to the users or others, resulting in a form known as the
substance-related disorder. The definition of drug abuse varies in the context of medical, public
health, and criminal justice use. When an individual is under the influence of a substance, antisocial behaviors are likely to occur as well as the long-term change in personality (Langwith 16).
Patterned substance abuse leads to social, physical, and psychological harm or criminal
consequences. Globally, there are more than 190 million substance abusers, and this problem is
increasing at a high rate among the young people below the age 30.
Drugs that are abused are categorized into three major groups that include stimulants,
depressants, and hallucinogens. Stimulants are a group of drugs that stimulate the brain, leading
to increased alertness and burst of activities. These drugs alter the bodily functions by increasing
the heart rate, raising the blood pressure, dilation of the pupil and behavioral changes such as
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