Generally drugs work in the brain because they have a similar size and shape as natural neurotransmitters. Brains communicate through electrical impulses between neurons.
However, drugs causes the neurons to release large amounts of unnatural electrical impulses, causing overflow of neurotransmitters in the brain.
These drugs affect the limbic system of people's brains (practically the whole peach part of the brain on the left), which is responsible for survival, such as creating appetite for the things needed for survival. Some examples of needs for survival are food and company (friends).
That is probably why drug abusers have problem with other, because their limbic systems have been affected.
The drug that I researched about, Cocaine, had some postive and negative effects psychologically.Some of the positive effects of Cocaine is that it increases alertness, elevates the mood, medium to high degree of happiness, decreases fatigue, increases concentration, and increases energy. The negative effects are increased irritability, insomnia, and restlessness. It seems as if Cocaine is a good drug if you look at the positive effects compared to the negative. However, an overdose of cocaine would cause pattern of mental disability, increased irritability, confused and disorganized behavior, hallucinations, and could become antisocial and aggresive.
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