The rate of current and past-year use of Ecstasy has increased dramatically among 8th and 10th graders in the U.S.
Smoking crack cocaine can produce particularly aggressive paranoid behavior in certain users.
Percocet addicted individuals will eventually find that they need to use the drug to feel normal, and will exhibit drug-seeking behavior and often become preoccupied with thoughts about using and obtaining the drug.
Valium can cause anterograde amnesia (an inability to recall the recent past), which may persist as long as 6 months and may not ever fully return to normal after an individual stops taking the drug.