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Here are some of the effects of ritalin, u probably already know.

For every one of the following Ritalin effects, there is at least one confirming source in the medical literature:

• Paranoid delusions
• Paranoid psychosis
• Hypomanic and manic symptoms, amphetamine-like psychosis
• Activation of psychotic symptoms
• Toxic psychosis
• Visual hallucinations
• Auditory hallucinations
• Can surpass LSD in producing bizarre experiences
• Effects pathological thought processes
• Extreme withdrawal
• Terrified affect
• Started screaming
• Aggressiveness
• Insomnia
• Since Ritalin is considered an amphetamine-type drug, expect amphetamine-like effects
• Psychic dependence
• High-abuse potential DEA Schedule II Drug
• Decreased REM sleep
• When used with antidepressants one may see dangerous reactions including hypertension, seizures and hypothermia
• Convulsions
• Brain damage may be seen with amphetamine abuse.