Ritalin is a mild central nervous system stimulant that triggers the brain stem .
            
arousal system and the cerebral cortex. It increases the norepinephrine and the dopamine .
            
at the central nervous system synapses. Ritalin blocks the reuptake of dopamine. It is .
            
similar chemically and pharmacologically to the amphetamines. The generic name for .
            
Ritalin is methylphenidate. It is currently used for the treatment of Attention Deficit .
            
Disorder/Attention Deficit Hyperactivity Disorder, narcolepsy, with mild depression in .
            
the elderly and cancer patients, and to increase the action of antidepressant medication in .
            
treatment resistant depression. Recently, Ritalin has been used experimentally with stroke .
            
patients (Wright, 1997).
            
A normal dose of methylphenidate is between fifteen and thirty milligrams per .
            
day in divided doses. The drug takes effect in half an hour to one hour; it's effects last .
            
four to six hours with the regular tablets and up to eight hours with the extended release .
            
tablets. On-going research is confirming if the slow release or the original Ritalin is better .
            
at controlling symptoms. Ritalin must be taken on a very precise schedule to receive .
            
maximum benefits. Metabolism occurs in the liver and excretion occurs in the kidneys. .
            
Almost ninety-five percent of a dose can be recovered as metabolites in the urine within .
            
ninety hours.  Noven Pharmaceuticals is developing a transdermal patch that releases a .
            
therapeutic dose of methylphenidate for up to twenty- four hours. Ritalin is not .
            
recommended for use during pregnancy; it is unknown if it passes through breast milk .
            
(Wright, 1997).
            
The benefits of Ritalin are it controls distractibility, increases social skills, .
            
emotional state and behavior, allows the clients to concentrate, organize their thoughts, .
            
increases motor control, and allows them to pay attention. Ritalin has been used since the .
            
1950's to treat Attention Deficit Hyperactivity Disorder; approximately ninety percent of .