Describes a study showing that cocaine, which increases dopamine levels, also can tap into an intracellular dopamine reserve pool.
Reports on the work of addiction researchers who are learning how acute and chronic cocaine exposure regulates certain genes, based on knowledge from developmental and cancer biology.
Discusses the central importance of studying drugs' effects on neurotransmission and describes some of the most common experimental methods used in this research.
Presents highlights of a study indicating that exposure to morphine during adolescence may increase sensitivity to the drug during adulthood.
Highlights data from an annual national survey of youth showing a pattern of rising nonmedical use of sedatives among high school seniors.
Summarizes research suggesting a physiological difference as the explanation for African-Americans' reported low tolerance for pain.