A person, who is highly addicted to drugs, can show chemical dependency you to a number of reasons. A person, who is highly addicted to drugs always look for drugs, and it is the only way that can help the person in order to lead a normal life. It is the only thought, which comes to mind for the addicted person.
If you are having a person, or know a person, who is always looking for money for purchasing drugs, there is every possibility that the person will show chemical dependency, in the absence of enough funds for Accumulating drugs. In such cases, it is always advisable that you do not give money to that person.
But not giving money to the person is not the only solution, as the person will always find other ways of accumulating money. Thus, you should block all the ways, by which a person, who is addicted to drugs, can actually find money. It is only after that; you should take the person to any drug rehab center.