  :::::With reference to the girl above, you are referring to crack cocaine, which has very different effects to powdered cocaine as they are far more immediate and powerful and thus, there is likely to be a stronger potential for addiction. Research so far suggests that certain people are more susceptible to misuse and addiction if they have lower levels of dopamine along their mesolimbic reward pathway. This basically means that they need a lot of stimulation to become exciting and cocaine provides exactly that. If you couple this with low danger awareness, then again you are more susceptible to becoming addicted to the drug. Cocaine, is currently not viewed as physiologically dependent because it is not even known which area of the brain is affected by cocaine thus, we say it is psychologically addictive. It is also for this reason why CBT programmes work so well with cocaine addiction because of the psychological elements. 