A Drug is anything that alters the normal course of body functioning.
Legal drugs are any over the counter or prescribed drug that is taken the way it is intended.
Illegal drugs are any drugs that are prescribed but not taken the way they were prescribed or any drug that is classified as illegal such as heroin.
If you are interested in a free online screening through College Response check out: http://www.mentalhealthscreening.org/screening/cameronu
Parents here is another page with great information: http://www.collegeparentsmatter.org/