Meth or methamphetamine is an extremely addictive synthetic drug. It works by producing a pleasant effect followed by an unpleasant one. This happens through the suppression of the normal production of dopamine, which creates a chemical imbalance. To return to normal, the person needs more of the drug and the cycle of meth addiction begins. The brain adapts to the presence of amphetamine by decreasing production of the normal chemical messenger. The addict then begins to increase the amount they use in an effort to recapture that pleasurable feeling. At some point, the methamphetamine addict cannot use anymore and "crashes" (their body and mind has had enough.) If you or anyone you know is addicted to meth, please get some professional help immediately. Visit http://www.drugabuse.com/?utm_source=yedda&utm_medium=pv&utm_campaign=homepage for more help and information.