An examination of the effects of drugs on the brain and behavior. Content focuses on the mechanism by which legal and illicit drugs affect the brain and on how drug-induced brain changes alter behavior. In addition, major biological and psychological theories of addiction are examined. This class also explores how drugs are used and abused in different societies and cultures, the effects of this use and abuse on psychology and behavior, and how addiction is treated. Laboratory course. This course cannot be taken for credit if the student has already received credit for PSYC 349. Open only to juniors or seniors pursuing programs in neuroscience or psychology. Prerequisite: PSYC 251.