Long-term psychological problems often follow an adverse reaction or bad LSD trip.
Major League Baseball players are no longer allowed to use amphetamines as of 2006, a ban which is enforced through periodic drug-testing.
The rate of current marijuana use among American youth aged 12 to 17 has been increasing in recent years and in 2009 was 7.3, and rose again to 7.4 percent in 2010.
Less than one-fifth of incarcerated offenders struggling with substance abuse receive drug rehab while incarcerated (not including participation in self-help or drug education).