This course considers constructs and theories related to legalized and illicit drug use, abuse, and addiction across the life span. Focus is placed on the biological, psychological, and social antecedents of drug use and on the biopsychosocial consequences of drug use and dependence within developmental contexts. The course examines specific drug addictions and treatment approaches. Health psychology, counseling psychology, developmental psychology, neuropsychology, medicine, health education, and public health perspectives are considered. The course emphasizes the interplay of the knowledge and understandings developed from these perspectives and applies this knowledge to research and counseling practice.