Like any other college, Auburn does have to deal with the presence of drugs. Fortunately, if you're not looking for that kind of recreation, then you probably won't come across it.
Most students cite alcohol and marijuana among the most commonly used drugs at Auburn. Caffeine and amphetamine drugs, like Ritalin and Adderall, are also common and associated with concentration. Use of cocaine is occasionally present. If you choose to take that route, then you do so at your own risk. If not, then you probably won't come in contact with many drugs. If you find yourself in an uncomfortable situation, then don't hesitate to leave or contact someone for help, if necessary.