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  1. 1. Genetic Vulnerability. Individuals’ preferences to engage in one behavior versus another are shaped by their genetic endowment in interaction with their past experiences. The interactions...

  2. Why do people take drugs? In general, people take drugs for a few reasons: To feel good. Drugs can produce intense feelings of pleasure. This initial euphoria is followed by other effects, which differ with the type of drug used.

  3. There are countless reasons why people begin to abuse drugs, whether theyre illicit drugs or prescription medications. The range of reasons why people take drugs is as broad as the types of people who use them.

  4. Drug addiction, also called substance use disorder, is a disease that affects a person's brain and behavior and leads to an inability to control the use of a legal or illegal drug or medicine. Substances such as alcohol, marijuana and nicotine also are considered drugs.

  5. Provides an overview of drug use and addiction, including what happens in the brain during drug use, why some people become addicted while others don't, and the importance of prevention.

  6. What are the most common causes of addiction? There are no substances (or activities) that universally or uniformly cause people to become addicted. And the vast majority of people exposed to...

  7. 1. Genetic Vulnerability. Individuals’ preferences to engage in one behavior versus another are shaped by their genetic endowment in interaction with their past experiences. The interactions...