Measuring Acute Drug Demand in Humans II

This research is being done to evaluate the impact of various drugs and combinations of drugs on mood, pain, and performance. Participants will complete 1 screening visit and 7 study test sessions. During the study sessions the participant will receive a study drug that may contain blinded drugs or drug combinations. Participants will answer questions about how the participant feels, perform tasks that measure the participant's cognitive ability and experience of pain, and have heart rate and blood pressure measured. While not at the laboratory, participants will be asked to wear a wristwatch that measures sleep and activity and complete questions about sleep.