Considering personal relationship with drugs, I can see that. In environments where there are drugs or for drugs that easy. Are the individuals who have experienced drug use vary considerably.
If considered in terms of a person who is associated with the drugs, and then to see that in an environment where there is drug or drugs, that makes it easy to find people with years of experience using different drugs.
If you consider in terms related to drugs, and then the person will see that in the environment that is easy to find, or that there will be someone who has experience with different drugs.