There is certainly a fair amount of drug use at Emory, but those who use drugs other than marijuana and alcohol are very quiet and stealthy about doing so. Students are rarely pressured to do any drugs, and this a definitely a good thing, especially for new students.
Marijuana use is the most common on campus, as it likely is on many other college campuses. ADD medication or study drugs such as Adderall and Concerta are also used quite frequently as study aids. Many students pay a pretty penny for these pills, but to some this is just pocket change, another variable that facilitates the "drug scene" on campus. Emory in no way has a drug problem on campus, but there is a fair number of students who frequently use and abuse various drugs. Abuse is a relative term, though, because if any student were unable to keep up with his or her school work because of their drug use, they would fall behind and be unable to attend Emory.