4.4% of UC Davis undergraduates reported using a prescription stimulant in the last 12 months that was not prescribed to them. 6.8% of UC Davis students reported using prescription painkillers that were not prescribed to them in the last 12 months; 7.8% of UC Davis students have reported using MDMA and 4.7% have reported using other hallucinogens; 2.9% of UC Davis students report using marijuana everyday