Research indicates that past year rates of LSD use among college students, young adults, and eighth, tenth, and twelfth graders show a sharp decrease over the last ten years.
PCP users may sometimes become violent or suicidal, and are very dangerous to themselves and to others.
The purity of Ecstasy is always in question, a factor which can vary widely between regions and different brands of pills and fluctuates somewhat each year.
Many school districts in the United States have begun to test for abuse of illicit drugs, including steroids, and studies are currently underway to determine whether such testing reduces drug abuse.