ANOTHER SCHOOL SHOOTER ON PRESCRIBED PSYCHOTROPIC
One month after the school shooting in Littleton, CO, where the leader of the two dead gunmen was on the mania-inducing drug Luvox, a youth on the mania-inducing drug Ritalin went on a shooting rampage at a high school in Conyers, Georgia. 
Ritalin, or methylphenidate, is a stimulant that, along with methamphetamine, is classified by the DEA as a Schedule III drug.  Ritalin makes "overactive" kids more manageable and obedient.
However, in some cases Ritalin can induce mania and "psychotic episodes including hallucinations" that subside upon discontinuation of the drug. 
Research also shows that Ritalin can cause normal brains to function like schizophrenic brains. As a study published in the journal "Archives of General Psychiatry" (9/88, p.827-32) states : "Methylphenidate induced a pattern of information processing dysfunction similar to that seen in schizophrenic patients... Further, the time course of the observed deficits in both schizophrenic and methyl-phenidate-induced states is strikingly compatible with the temporal mapping pattern of monoaminergic neuronal systems."
While doctor-prescribed Ritalin use increased five-fold since 1990 , Ritalin is also a popular drug with students as a means to get high. As an article at student.com states :
"Some swallow [Ritalin] pills, while others crush tablets into powder and snort the drug like they would cocaine. Students report abuse has become so common -- and students like the drug so much -- that fraternities are stockpiling it with the same vigilance they take to ensure they never run out of beer."
Ritalin is also popular on the "Rave scene," and research shows that its mode of action on the brain is comparable to that of cocaine,  which can also trigger violence in some cases.
More information on the dangers of Ritalin:
 Reuters: "Lawyer Confirms Georgia School Shooter On Ritalin." Tuesday May 25 8:56 AM ET.
 DEA drug classifications:
 Archives of General Psychiatry: "Methylphenidate-induced information processing dysfunction in nonschizophrenic patients." 1988 Sep;45(9):827-32.
 (journal) Synapse: "Comparable changes in synaptic dopamine induced by methylphenidate and by cocaine in the baboon brain." January 1999;31(1):59-66. http://igm.nlm.nih.gov
GODDARD'S JOURNAL: http://www.erols.com/igoddard/journal.htm
Kirby The Konspiracy Boy Says, "I NEED 2 KONFORM!!!"