Nicknames:
Speed, west coast

NOTE: Ritalin, a legally prescribed medication for treating Attention Deficit Disorder and hyperactivity, is sometimes sold and abused as a street drug.

Effects:
Loss of appetite
Fevers, convulsions, and severe headaches
Increased risk of exposure to HIV, hepatitis, and other infectious diseases if injected
Irregular heartbeat and respiration
Paranoia, hallucinations, delusions
Excessive repetition of movements and meaningless tasks
Tremors, muscle twitching