Risperdal

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Risperdal

Risperidone is an atypical antipsychotic used to alleviate the

symptoms of schizophrenia. Schizophrenia is defined by its effects

in altering perception, thoughts, or consciousness called

hallucinations or delusions. It affects about 1% of the population,

with about 2 million people affected in the United States. About 50%

of those affected become severely and permanently disabled and

dependent upon public assistance. Schizophrenics make up about 10%

of the totally disabled population and as much as 14% of the

homeless. The United States spends about $70 billion annually.

About 1 out of 4 patients will attempt suicide, and 1 in 10 will

succeed. There is great social stigma associated with the disease

(Sarason & Sarason, 2001, pg. 350).

The dopamine theory behind the cause of schizophrenia states

that in part excess dopamine is a possible factor or there is more

than an average number of dopamine, Type 2 receptors. Risperidone

acts on the dopamine D2 receptor (Sarason, et al, 2001, pg. 368).

Risperidone is a psychotropic drug and is part of the chemical

class of benzisoxazole derivatives used as a treatment for

schizophrenia, with some results for bipolar manic disorder, as well.

The molecular formula is C23H27FN4O2, with a molecular weight of

410.49 (Ereshefsky & Mascarena, 2003).

Route of administration is oral. Once the drug passes the

esophagus and stomach, it makes its way into the small intestines.

There are beds of capillaries within the intestine walls.

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