The movie Trainspotting depicts the confusion, anger and turmoil many heroin addicts are subjected to and what happens once they try to quit.
             Drug abuse is generally defined as the use of a drug with such frequency that the user has physical or mental harm or it impairs social abilities. These drugs affect moods, emotions, feelings and thinking processes, or they can alter the workings of the mind. A person dependant on drugs usually carries three basic characteristics that are indicators. First, the user continues to use the drug for an extended period of time. Difficulties in stopping usage are the second characteristic that may lead to dropping out of school, trouble with the law, jail, losing a job, and family problems. Mental distress and physical pain due to withdrawal when the users stop taking the drug are another characteristic of a drug dependant. All these characteristics can be applied to the main character in Trainspotting, Mark Renton.
             Still, people continue to be dependent on and use drugs, even though consequences are so severe. This is because drug abusers either are unable to see the penalties or reduce the severity of them in their mind. Their mind and body craves the high. Inside of the brain, natural chemicals are produced called endorphins. These chemicals make a person feel pleasure and take away pain either during sexual orgasm, physical exercise or spiritual uplifting. Drug abuse is way of imitating these naturally occurring chemicals in the brain. Drug abusers find the sense of pleasure is quite easy to obtain through drug usage. When drugs are repeatedly used to simulate endorphins, the body cuts down on the production of them. This causes the drug user to continue to abuse. Endorphin release is also why some people can become compulsive in exercising or even become an extreme sex enthusiast.
             In the movie, Renton is heroin addict. Heroin is an opiate. Opiates are strongly addictive drugs
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