The nervous system shuts down and the user stops breathing. They may say things that seem totally non-sensical or out of context, but to them seem very profound. Hallucinogens have seen a resurgence among teenagers, but their use effects all ages of the inner city, the suburbs, and small towns. Users of amphetamines seem like they are on fast-forward. They talk fast and walk fast.
Habitual users tend to be very thin because they forget to eat.
When they come down from the speed, their bodies are worn out from the hyperactivity, but their minds are still racing. Speed is cheap, manufactured locally, distributed fairly openly and widely and effects all age, race, and economic groups. PCP is a powerful animal tranquilizer, but acts as a stimulant on most people. PCP is typically used by teenagers of any race or sex. The user will feel numb all over and have frequent blackouts.