Like some other drugs, the more one uses crystal meth, the more the body needs to get the desired effect as it develops a tolerance to crystal meth. Binging is common to try to sustain the desired effect. Tolerance happens more rapidly if crystal meth is smoked or injected. Prolonged use at high levels leads to tolerance and both psychological and physical dependence on the drug. Psychological dependence occurs when you feel that you cannot function without the drug. Physical dependence occurs when your body has adapted to the presence of the drug, and withdrawal symptoms occur if its use is stopped.

Some people are able to keep their crystal meth use under control and usually use in a social setting, mostly on weekends. However, crystal meth is very easy to get addicted to when used for a period of time. It is very inexpensive (as little as $5 a day), and is deeply rooted in some social circles, in that social networks tend to support crystal meth use. When someone has difficulty functioning without crystal meth, it is a sign of trouble. Signs of addiction or dependence on crystal meth include compulsively seeking the drug and wanting to use the drug, violent behaviour, anxiety, confusion, insomnia, psychotic features such as paranoia, hallucinations, mood disturbances, delusions (the most common one is a sensation of insects creeping on your skin), irregular heart beats, a possible stroke, and suicidal thoughts. Withdrawal symptoms such as anxiety, fatigue, a rash, diarrhea, sweats, chills and fevers, severe depression, suicidal thoughts, paranoia, aggression, and an intense craving for the drug. Treatment and support are necessary in this situation. Dealing with addiction requires a period of detoxification, followed by rehabilitation to relearn how to live a sober life. Counseling is recommended to address deeper issues that may be leading you to take crystal meth. People who have become dependent on crystal meth often make many attempts to quit using before they are successful. It can also be difficult to maintain the same social network if trying to quit, as friends may be continuing to use crystal meth.

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