Ritalin

1491 Words3 Pages

Ritalin

Abstract

Ritalin (Methylphenidate) is a mild CNS stimulant. In medicine,
Ritalin's primary use is treatment of Attention Deficit /Hyperactive Disorder
(ADHD). The mode of action in humans is not completely understood, but Ritalin presumably activates the arousal system of the brain stem and the cortex to produce its stimulant effect. Recently, the frequency of diagnosis for ADHD has increased dramatically. More children and an increasing number of adults are being diagnosed with ADHD. According to the Drug Enforcement Agency (DEA)
(Bailey 1995), prescriptions for Ritalin have increased more than 600% in the past five years. Ritalin has a long history of controversy regarding side effects and potential for abuse, however it greatly benefits those with ADHD.

Psychological effects of Ritalin

Ritalin (Methylphenidate) is manufactured by CIBA-Geigy Corporation. It is supplied in 5 mg., 10 mg., and 20 mg. tablets, and in a sustained release form, Ritalin SR, in 20 mg. tablets. It is readily water soluble and is intended for oral use. It is a Schedule II Controlled Substance under both the Federal and Vermont Controlled Substance Acts. Ritalin is primarily used in the treatment of Attention Deficit/Hyperactive Disorder (ADHD) (Bailey 1995).
ADHD is a condition most likely based in an inefficiency and inadequacy of Dopamine and Norepinephrine hormone availability, typically occurring when a person with ADHD tries to concentrate. Ritalin improves the efficiency of the hormones Dopamine and Norepinephrine, increasing the resources for memory, focus, concentration and attention (Clark 1996).
Ritalin has been used for more than 30 years to treat ADHD. Nervousness and insomnia are the most common adverse reactions reported, but are usually controlled by reducing dosage or omitting the afternoon or evening dose.
Decreased appetite is also common but usually transient (Long 1996).

According to Clark (1996), children, adolescents and adults diagnosed with ADHD usually report the following effects when successfully treated with Ritalin:
•Improved concentration.
•Better "focus".
•Improved ability to complete their work.
•Improved intensity of attention and longer attention span.
•Reduced distractibility.
•Reduced impulsivity.
•Reduced restlessness and overactivity.
•Improved patience.
•More elaborate expressive vocabulary.
•Better written expression and handwriting (especially in children).
•An improved sense of "alertness".
•Improved memory for visual as well as auditory stimuli.

Ritalin's Effect on Neurotransmitter Systems

Ritalin exhibits pharmacological activity similar to that of amphetamines. Ritalin's exact mechanism of action in the CNS is not fully understood, but the primary sites of activity appear to be in the cerebral cortex and the subcortical structures including the thalamus. Ritalin blocks the reuptake mechanism present in dopaminergic neurons. As a result, sympathomimetic activity in the central nervous system and in the peripheral nervous system increases. Ritalin-induced CNS stimulation produces a decreased sense of fatigue, an increase in motor activity and mental alertness, mild euphoria, and brighter

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