(Note: Ritalin is a legally prescribed medication for treating Attention Deficit Disorder and hyperactivity.)

Effects:

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