Drug addicts types

Experts are divided on whether or not heavy, longterm marijuana use causes the same kind of addiction that opium or crack does. Evidence shows that daily marijuana use over time can lead to withdrawal symptoms such as aggression, irritability, and stomach pains these are hallmarks of addiction. Also, long-term use can cause some of the same destructive brain changes as those found in other types of drug addictions. Studies in... 

A deeper understanding of the molecular mechanisms underlying tobacco addiction will lead to the identification of different types of smokers. Classifying smokers according to the underlying biological processes involved in their addiction will lead to new treatments for tobacco dependence. Patient-specific therapy with both choice of treatment and dose of drug informed by DNA analysis seems likely to be more effective than conventional therapy with fewer unwanted effects. 

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