What is the basis for the reduction in disturbed thought processes when a patient is ad-ministered haloperidol (Haldol)?
a. Reduction in the number of brain cells that crave dopamine
b. Dopamine receptors are blocked, making dopamine less available
c. Dopamine receptors are enhanced, making more dopamine available
d. Medication causes an increased cellular production of dopamine
ANS: B
Excess dopamine is responsible for symptoms of psychosis such as delusions and hallucina-tions. Blocking dopamine receptors will result in reduction of primary symptoms. The other options do not reflect the action of typical antipsychotic medications.
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