http://www.youtube.com/watch?v=QYlwSepW7Bs
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this is clipfrom an article i read about meth: http://fayettecountysheriff.com/methamphetamine.htm
The drug works directly on the brain and spinal cord by interfering with normal neurotransmission. Neurotransmitters are chemical substances naturally produced within nerve cells used to communicate with each other and send messages to influence and regulate our thinking and all other systems throughout the body. The main neurotransmitter affected by methamphetamine is dopamine. Dopamine is involved with our natural reward system. For example, feeling good about a job well done, getting pleasure from our family or social interactions, feeling content and that our lives are meaningful and count for something, all rely on dopamine transmission.
A synthetic drug, methamphetamine has a high potential for abuse and dependence. It is illegally produced and sold in pill form, capsules, powder and chunks. Methamphetamine was developed early in this century from its parent drug amphetamine and was originally used in nasal decongestants, bronchial inhalers, and in the treatment of narcolepsy and obesity. In the 1970s methamphetamine became a Schedule II drug - a drug with little medical use and a high potential for abuse.
